This is not where connective tissue roles end. Connective Tissue Associated with Muscle Tissue Quiz: Connective Tissue Associated with Muscle Tissue Structure of Skeletal Muscle Quiz: Structure of Skeletal Muscle Muscle Contraction Types … Blood contains formed elements derived from bone marrow. Connective tissue proper includes loose connective tissue and dense connective tissue. As with dense regular connective tissue, when elastic fibers running in random directions outnumber collagen fibers, the tissue is a dense irregular elastic connective tissue. The condition causes pain and tenderness in the area around a joint. In other tissues, stretching in several directions is achieved by alternating layers where fibers run in the same orientation in each layer, and it is the layers themselves that are stacked at an angle. This ground substance is usually a fluid, but it can also be mineralized and solid, as in bones. After examining your swollen wrist, the doctor in the emergency room announces that you have developed wrist tendinitis. Loose Connective Tissue with nuclei (N) labeled. Collagen fibers are made from fibrous protein subunits linked together to form a long and straight fiber. As you might expect, a fibrocyte, a less active form of fibroblast, is the second most common cell type in connective tissue proper. The dermis of the skin is an example of dense irregular connective tissue rich in collagen fibers. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Other types include epithelial tissue, muscle tissue, and nervous tissue.They are developed from the mesoderm.Connective tissues are present in between another type of tissues that establish … These serve to hold organs and other tissues in place and, in the case of adipose tissue, isolate and store energy reserves. Organ capsules (collagenous type) and walls of arteries (elastic type) contain dense irregular connective tissue. Hyaline Cartilage Structure – The chondrocytes (cells) lie in lacunae (spaces around cells). Tendinitis is the inflammation of a tendon, the thick band of dense regular connective tissue that attaches a muscle to a bone. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Some applications require a ligament to balance tensile strength and elasticity, and thus contain elastic fibers in addition to collagen fibers that allow the ligament to return to its original length after stretching. The major component of the matrix is a ground substance often crisscrossed by protein fibers. Cells And Tissues Body Tissues Medical Facts Medical Science Histology Slides Pa School Medical School Ligaments And Tendons Human Anatomy And Physiology They are found throughout the body, but are most abundant in the reticular tissue of soft organs, such as liver and spleen, where they anchor and provide structural support to the parenchyma (the functional cells, blood vessels, and nerves of the organ). Dense regular connective tissue 400X Tendon In this image a fibroblast nucleus (fb nuc) is labeled, but you can see other nuclei once you know what to look for. The knee and jaw joints and the intervertebral discs are examples of fibrocartilage. Platelets are cell fragments involved in blood clotting. shows: collagenous fibers (pink, in parallel arrays), and fibroblasts (flat, dark structures). You should make a label that represents your brand and creativity, at the same time you shouldn’t forget the main purpose of the label. Brown adipose tissue is thermogenic, meaning that as it breaks down fats, it releases metabolic heat, rather than producing adenosine triphosphate (ATP), a key molecule used in metabolism. There is a large amount of extracellular matrix which is bordered on either side by the perichondrium. Blood and lymph are fluid connective tissues. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Q. By the end of the section, you will be able to: As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. The surface of hyaline cartilage is smooth. Cytokines recruit other cells of the immune system to infected sites and stimulate their activities. The fibers are mainly composed of type I collagen.Crowded between the collagen fibers are rows of fibroblasts, fiber-forming cells, that generate the fibers.Dense connective tissue forms strong, rope-like structures such as tendons and ligaments. Bones are made of a rigid, mineralized matrix containing calcium salts, crystals, and osteocytes lodged in lacunae. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. Notice the dense regular arrangement of collagenous fibers. In loose connective tissue, the fibers are loosely organized, leaving large spaces in between. Function. When irritated or damaged, mast cells release histamine, an inflammatory mediator, which causes vasodilation and increased blood flow at a site of injury or infection, along with itching, swelling, and redness you recognize as an allergic response. Some appear in cross section, and other longitudinally. Navigation best viewed on larger screens. This construction ideally resists tension and maximally transmits force. Clusters of mesenchymal cells are scattered throughout adult tissue and supply the cells needed for replacement and repair after a connective tissue injury. These structures are composed of densely packed collagen bundles in parallel array. Its cellular content is highly abundant and varied. Fibroblasts are the most abundant and secrete many protein fibers, adipocytes specialize in fat storage, hematopoietic cells from the bone marrow give rise to all the blood cells, chondrocytes form cartilage, and osteocytes form bone. A. cells, ground substance, and carbohydrate fibers, B. cells, ground substance, and protein fibers, C. collagen, ground substance, and protein fibers. What type of connective tissue should you expect ligaments to contain? Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column. Labels are usually small in size, so you should carefully choose the font of the texts to make sure it is readable. There are three main groups of connective tissues: Loose connective tissue holds organs in place and attaches epithelial tissue to other underlying tissues. Adipose tissue consists mostly of fat storage cells, with little extracellular matrix (Figure \(\PageIndex{2}\)). Q. Connective tissue is made of which three essential components? elastic tissue. Click here to let us know! Anatomy A215 Virtual Microscopy . Neuron 40x . e.g. Elastic Connective Tissue Human Anatomy and Physiology (BIOL& 241L-242L) Karen Hart, Peninsula College: Epithelial tissue; Connective tissue proper. Dense connective tissue contains more collagen fibers than does loose connective tissue. All connective tissues derive from the mesodermal layer of the embryo. Connective tissue in the tendon does not have abundant blood supply and heals slowly. 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These cells can differentiate into any type of connective tissue cells needed for repair and healing of damaged tissue. These layers are referred to as the superficial fascia, deep fascia, and subserous fascia (Figure \(\PageIndex{9}\)). Structures A, B, C, and D are all various types of glands. dense regular connective tissue which is found in tendons and ligaments, and is shown below. You can also put your logo at the top or bottom corner of the label. Key Difference – Dense Regular vs Dense Irregular Connective Tissue. Loose connective tissue is found between many organs where it acts both to absorb shock and bind tissues together. Tendinitis is routinely diagnosed through a clinical examination. It fills the spaces between muscle fibers, surrounds blood and lymph vessels, and supports organs in the abdominal cavity. She recommends icing the tender area, taking non-steroidal anti-inflammatory medication to ease the pain and to reduce swelling, and complete rest for a few weeks. Under the microscope, tissue samples appear clear. The collagen fibers (cf) are parallel to … Q. Neuron 100x . Connective tissue provides support to the organs and tissues of the body and is separated into two types: loose connective tissue, which is more abundant, and dense connective tissue. 2) Dense Irregular Connective Tissue This tissue gives rigid support as well as elasticity. Can you name the 10 tissue types shown in the histology slides? Unlike cartilage, bone tissue can recover from injuries in a relatively short time. Question: Correctly Identify This Tissue Type And Then Label The Features Of The Tissue Ground Substance Bundles Of Collagen Fibers Fibroblast Nucles Chondroblast Nuclei Reticular Fibers Lymphocytes Elastic Fibers Gland Ducts Dense Regular Connective Tissue Dense Irregular Connective Tissue It is also in the sclera and in the deeper skin layers. Brown adipose tissue is more common in infants, hence the term “baby fat.” In adults, there is a reduced amount of brown fat and it is found mainly in the neck and clavicular regions of the body. Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. Tug gently at your ear lobes, and notice that the lobes return to their initial shape. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. Some white blood cells have the ability to cross the endothelial layer that lines blood vessels and enter adjacent tissues. It is found in areas of the body where large amounts of tensile strength are required, like in ligaments, tendons and aponeurosis. These combine to form a proteoglycan with a protein core and polysaccharide branches. All of these fiber types are embedded in ground substance. Elastic fibers contain the protein elastin along with lesser amounts of other proteins and glycoproteins. OpenStax Anatomy & Physiology (CC BY 4.0). Fibroblasts are present in all connective tissue proper (Figure \(\PageIndex{1}\)). B. It allows water, salts, and various nutrients to diffuse through to adjacent or embedded cells and tissues. It contains all the cell types and fibers previously described and is distributed in a random, web-like fashion. Dense regular connective tissue (DRCT) is divided into white fibrous connective tissue and yellow fibrous connective tissue, both of which occur in two forms: cord arrangement and sheath arrangement. In many sources, this type is listed as connective tissue proper; however, … Both tissues have a variety of cell types and protein fibers suspended in a viscous ground substance. Gardenwoodresort. Create. Loose connective tissue (LCT), also called areolar tissue, belongs to the category of connective tissue proper. The collagen fibers in dense regular connective tissue are bundled in a parallel fashion. Visit this link  (http://www2.yvcc.edu/histologyzoomer...issueQuiz.html)  to test your connective tissue knowledge with this 10-question quiz. The game is over for now. {Label Gallery} Get some ideas to make labels for bottles, jars, packages, products, boxes or classroom activities for free. If the closely packed bundles of fibers are located in one direction, it is called regular; if oriented in multiple directions, it is referred to as irregular. Dense connective tissue. It is lighter than compact bone and found in the interior of some bones and at the end of long bones. Injuries to cartilage heal very slowly because cells and nutrients needed for repair diffuse slowly to the injury site. Protein fibers fall into three major groups: collagen fibers that are thick, strong, flexible, and resist stretch; reticular fibers that are thin and form a supportive mesh; and elastin fibers that are thin and elastic. It is thicker and stronger than loose connective tissue and forms a protective capsule layer around organs such as the liver and kidneys. Each adipose cell, or adipocyte, has its cytoplasm stretched around a … A second type of embryonic connective tissue forms in the umbilical cord, called mucous connective tissue or Wharton’s jelly. Dense packing od component fibers maximum strength to this tissue. This type of tissue gives the walls of large arteries and respiratory passages strength and the ability to regain original shape after stretching. Adopted a LibreTexts for your class? 2. Connective tissues separate and cushion organs, protecting them from shifting or traumatic injury. Dense regular connective tissue - the tissue shown has a dense, regular arrangement of collagen fibers; the cells present are fibroblasts NOT squamous epithelial cells. These fibers hold connective tissues together, even during the movement of the body. Lymph contains a liquid matrix and white blood cells. The matrix contains very few blood vessels. Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml) to explore the tissue sample in greater detail. The fibers are mainly composed of type I collagen. Erythrocytes, or red blood cells, transport the gases oxygen and carbon dioxide. A. Without collagen, bones would be brittle and shatter easily. Feb 18, 2015 - dense irregular connective tissue labeled - Google Search Composed mainly of dense connective tissues, it serves as a tough, internal framework that surrounds muscles, bones, and nerves. Clinical/Critical Thinking Orthopedic surgeons are fond of saying, “It is better to break a bone than it is to tear a tendon or ligament.” Based on your understanding of these two types of connective tissue, explain why that would be true. 4 Connective tissue is a heterogeneous tissue class with assorted cell shapes and tissue architecture. 1) Dense Regular Connective Tissue • Dense fibers are arranged parallel to each other in the form of cords or bands • Examples: tendons, aponeurosis, ligaments. A. dense regular connective tissue B. simple squamous epithelium C. dense irregular connective tissue D. areolar connective tissue. The chemical nature and physical layout of the extracellular matrix and proteins vary enormously among tissues, reflecting the variety of functions that connective tissue fulfills in the body. Dense connective tissue is enriched in collagen fibers with little ground substance. Quizlet flashcards, activities and games help you improve your grades. elastic tissue. Dense Regular Connective Tissue Labeled | Creative Labels {Label Gallery} Get some ideas to make labels for bottles, jars, packages, products, boxes or classroom activities for free. Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. White fat contributes mostly to lipid storage and can serve as insulation from cold temperatures and mechanical injuries. EXERCISE 8 - Dense regular connective tissue Step1: Why is the orientation of the fibers important for the function of the tissue? ligaments (which link bone to bone at joints) and tendons (connections between bones or cartilage and muscle). The first connective tissue to develop in the embryo is mesenchyme, the stem cell line from which all connective tissues are later derived. Cartilage contains chondrocytes and is somewhat flexible. View the University of Michigan Webscope (http://virtualslides.med.umich.edu/Histology/ All of the preventive measures aim to increase the strength of the tendon and decrease the stress put on it. The threadlike fibers labeled e are elastic fibers. EXERCISE 6 - Loose connective tissue Step 1: Which of the labeled structures is responsible for that quality? Discuss how blood fulfills this role. Other components include collagen fibers (C) and elastic fibers (EF) Read more about Loose Connective Tissue, 40X; 1 comment; Dense Regular small intestine 10x Submitted by tstjacques on Wed, 02/21/2018 - 14:00. ; Specialized connective tissue encompasses a number of different tissues with specialized cells and unique ground substances. The formed elements circulating in blood are all derived from hematopoietic stem cells located in bone marrow (Figure \(\PageIndex{8}\)). She issues a stern warning about the risk of aggravating the condition and the possibility of surgery. An easy and convenient way to make label is to generate some ideas first. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. Bone tissue is highly vascularized. Cancellous bone is spongy and less solid than compact bone. Strong white flexible structures. This type of connective tissue is found mostly in the reticular layer (or deep layer) of the dermis. Poor blood supply, slow tissue repair. ... Epithelian tissue labeled slides 32 Terms. ... dense regular tissue. Dense Connective Tissue: The three types of dense connective tissue are dense regular, dense irregular, and elastic tissue. Students may have trouble locating the appropriate tissue on slides with multiple tissue types. Cartilaginous tissue is avascular, thus all nutrients need to diffuse through the matrix to reach the chondrocytes. Be able to recognize different types of connective tissue (e.g., dense irregular, dense regular, loose, adipose) and provide examples where they are found in the body. *Response times vary by subject and question complexity. Dense Regular Connective Tissue This section of TENDON shows the orderly and linear organization of the collagen fibers of dense regular connective tissue. Reticular cells produce the reticular fibers that form the network onto which other cells attach. They are dense regular connective tissue and dense irregular connective tissue. Macrophages, mast cells, lymphocytes, and plasma cells are found in connective tissue proper but are actually part of the immune system protecting the body. White adipose tissue can be found protecting the kidneys and cushioning the back of the eye. As fibroblasts are the most common cells in areolar tissue, the majority of the nuclei seen here are probably fibroblast nuclei. Among the four main basic types of animal tissues, connective tissue is one of the major types present. Dense Irregular Connective Tissue This image of the dermis shows irregularly oriented dense connective tissue. In adults, new connective tissue cells originate from the ________. EXERCISE 7 - Dense irregular connective tissue Where can this tissue be found? Without mineral crystals, bones would flex and provide little support. There are two basic types of adipocytes: white and brown. Polysaccharides and proteins secreted by fibroblasts combine with extra-cellular fluids to produce a viscous ground substance that, with embedded fibrous proteins, forms the extra-cellular matrix. Bone’s rigid extracellular matrix contains mostly collagen fibers embedded in a mineralized ground substance containing hydroxyapatite, a form of calcium phosphate. Aligned between the bundles are flattened, heterochromatic nuclei of fibroblasts. As a consequence, it displays greater resistance to stretching. Connective tissues perform many functions in the body, but most importantly, they support and connect other tissues; from the connective tissue sheath that surrounds muscle cells, to the tendons that attach muscles to bones, and to the skeleton that supports the positions of the body. For the passionate athlete, it may be time to take some lessons to improve technique. They originate in the mesodermal germ layer and differentiate from mesenchyme and hematopoietic tissue in the bone marrow. Connective Tissue Proper – Dense Regular Connective Tissue Function – Provide high tensile strength in one direction. A plate of hyaline cartilage at the ends of bone allows continued growth until adulthood. In all cases, overuse of the joint causes a microtrauma that initiates the inflammatory response. Supportive connective tissue—bone and cartilage—provide structure and strength to the body and protect soft tissues. In some tissues, fibers crisscross and form a mesh. In this variety of dense connective tissue, the fibers are densely packed and are arranged parallel to each other. Which of the following correctly describes a common feature of all structures labeled A-D in the figure? Q. Ligaments connect bones together and withstand a lot of stress. There are two types of dense connective tissue proper. The histology of transverse tissue from long bone (Figure \(\PageIndex{7}\)) shows a typical arrangement of osteocytes in concentric circles around a central canal. The ligaments in the vocal folds and between the vertebrae in the vertebral column are composed of dense regular elastic tissue. Both types contain an extensive matrix full of collagen fibers. It makes up a template of the embryonic skeleton before bone formation. Most often, the condition results from repetitive motions over time that strain the tendons needed to perform the tasks. Your opponent stands ready as you prepare to hit the serve, but you are confident that you will smash the ball past your opponent. Dense regular connective tissue 400X Tendon In this image a fibroblast nucleus (fb nuc) is labeled, but you can see other nuclei once you know what to look for. Dense regular tissue, small intestine, 10X objective, 100X total. Start studying Histology Lippincott Chapter 3 (Connective Tissue). collagenous fibers & tendons have high tensile strength - dense regular connective tissue fotografías e imágenes de stock As you have seen from the tissue types discussed above, the main role of connective tissues is to form the structural framework of the body. Answer: Click at the bottom of the quiz for the answers. A layer of dense irregular connective tissue covers cartilage. The collagen fibers are densely packed together and arranged in parallel to each other. Figure 1.17 Dense regular connective tissue. Nutrients, salts, and wastes are dissolved in the liquid matrix and transported through the body. The dense regular connective tissue is further classified into two varieties: dense regular collagenous connective tissue and dense regular elastic connective tissue. Crowded between the collagen fibers are rows of fibroblasts, fiber-forming cells, that generate the fibers. Attached muscles to bone, bone to bone 27. The other specialised types of connective tissue are covered in other topics. Feb 18, 2015 - dense irregular connective tissue labeled - Google Search There is a small amount of epithelium on the top (black) and some adipose tissue at the bottom and lower left (very light). Browse. That dull ache in the wrist that you ignored through the summer is now an unbearable pain. Surgical repair of a tendon is painful. In contrast, white fat adipocytes store lipids as a single large drop and are metabolically less active. The ECM is composed of a moderate amount of ground substance and two main types of protein fibers: elastic and reticular fibers. One of the main functions of connective tissue is to integrate organs and organ systems in the body. In dense irregular connective tissue, the direction of fibers is random. anatomy tissue #2 Learn with flashcards, games, and more — for free. • Dense regular connective tissue • Dense irregular connective tissue. Areolar tissue shows little specialization. The many mitochondria in the cytoplasm of brown adipose tissue help explain its efficiency at metabolizing stored fat. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver (Figure \(\PageIndex{4}\)). In bone, the matrix is rigid and described as calcified because of the deposited calcium salts. Be able to recognize a basement membrane (or basal lamina) in sections or micrographs where the structure is conspicuously present and understand its functions. You can't see the rest of the fibroblast cell because it stains the same color as the collagen fibers. Dense connective tissue is divided into 1) dense regular, 2) dense irregular, 3) elastic. iii). Lymphatic capillaries are extremely permeable, allowing larger molecules and excess fluid from interstitial spaces to enter the lymphatic vessels. Try using search on phones and tablets. Embedded within the cartilage matrix are chondrocytes, or cartilage cells, and the space they occupy are called lacunae (singular = lacuna). Dense Regular Connective Tissue. 8. provides levers for muscles to act on o Dense regular connective tissue 9. forms the walls of large arteries Key: o adipose connective tissue o areolar connective tissue o dense irregular connective tissue o dense regular connective tissue o elastic cartilage o elastic connective tissue o fibrocartilage o hyaline cartilage o osseous tissue Nervous Tissue 14. The number and type of adipocytes depends on the tissue and location, and vary among individuals in the population. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. identify the tissue. This arrangement gives the tissue greater strength in all directions and less strength in one particular direction. White adipose tissue is most abundant. dense regular tissue location. While older adults are at risk for tendinitis because the elasticity of tendon tissue decreases with age, active people of all ages can develop tendinitis. When stimulated, macrophages release cytokines, small proteins that act as chemical messengers. Dense regular connective tissue is mainly made up of type I collagen fibers. This is probably ________. The extracellular matrix contains fluid, proteins, polysaccharide derivatives, and, in the case of bone, mineral crystals. It serves to connect the cutaneous membrane to the underlying organs. A few distinct cell types and densely packed fibers in a matrix characterize these tissues. The brown adipocytes store lipids as many droplets, and have high metabolic activity. Areolar tissue underlies most epithelia and represents the connective tissue component of epithelial membranes, which are described further in a later section. Dense irregular connective tissue 100X Silver stain Most of the tissue you see in this image is dense irregular connective tissue (dict). Access for free at https://openstax.org/books/anatomy-and-physiology. The macrophage cells are an essential component of the immune system, which is the body’s defense against potential pathogens and degraded host cells. The major types of connective tissue are connective tissue proper, supportive tissue, and fluid tissue. The dense fibrous regular connective tissue slide is sometimes labeled white fibrous tissue. There are two major categories of dense connective tissue: regular and irregular. 3. Erythrocytes, red blood cells, transport oxygen and some carbon dioxide. Bone is a highly vascularized tissue. Fibrocytes, adipocytes, and mesenchymal cells are fixed cells, which means they remain within the connective tissue. Although repetitive motions are unavoidable in many activities and may lead to tendinitis, precautions can be taken that can lessen the probability of developing tendinitis. Cancellous bone, also known as spongy bone, looks like a sponge under the microscope (Figure \(\PageIndex{7}\)) and contains empty spaces between trabeculae, or arches of bone proper. The superficial fascia is found just deep to the cutaneous membrane (or skin) and is typically composed of a combination of areolar and adipose connective tissues. Search. Roaming, or free, macrophages move rapidly by amoeboid movement, engulfing infectious agents and cellular debris. Leukocytes, or white blood cells, are responsible for the defense of the organism against potentially harmful microorganisms or molecules. Underlying organs over and over again are often at the ends of bone you... In loose connective tissue is made of which three essential components knee, and proteins one particular direction in. 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