Fibroblasts are present in all connective tissue proper (Figure \(\PageIndex{1}\)). Protection is another major function of connective tissue, in the form of fibrous capsules and bones that protect delicate organs and, of course, the skeletal system. The main property of elastin is that after being stretched or compressed, it will return to its original shape. Fibrocartilage has a dense arrangement of cartilage fibers that are arranged in an orderly manner. It serves to connect the cutaneous membrane to the underlying organs. Key Difference – Dense Regular vs Dense Irregular Connective Tissue. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. The major types of connective tissue are connective tissue proper, supportive tissue, and fluid tissue. Supportive connective tissue—bone and cartilage—provide structure and strength to the body and protect soft tissues. Leukocytes, white blood cells, are responsible for defending against potentially harmful microorganisms or molecules. • Dense regular connective tissue • Dense irregular connective tissue. As you toss the ball high in the air, a burning pain shoots across your wrist and you drop the tennis racket. Fibrocartilage is tough because it has thick bundles of collagen fibers dispersed through its matrix. This tissue is no longer present after birth, leaving only scattered mesenchymal cells throughout the body. 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 All of these fiber types are embedded in ground substance. The condition causes pain and tenderness in the area around a joint. You can't see the rest of the fibroblast cell because it stains the same color as the collagen fibers. Your opponent stands ready as you prepare to hit the serve, but you are confident that you will smash the ball past your opponent. It is lighter than compact bone and found in the interior of some bones and at the end of long bones. Platelets are cell fragments involved in blood clotting. For the passionate athlete, it may be time to take some lessons to improve technique. Dense Regular Connective Tissue - Connective Tissue Labelled Diagram Connective tissue is a heterogeneous tissue class with assorted cell shapes and tissue architecture. Elastic cartilage can stretch and recoil to its original shape because of its high content of elastic fibers. Human Anatomy and Physiology (BIOL& 241L-242L) Karen Hart, Peninsula College: Epithelial tissue; Connective tissue proper. Reticular cells produce the reticular fibers that form the network onto which other cells attach. 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. A. dense regular connective tissue labeled hqdefault {Label Gallery} Get some ideas to make labels for bottles, jars, packages, products, boxes or classroom activities for free. Histology Learning System [ Connective Tissue, dense regular connective tissue, longitudinal] Both tissues have a variety of cell types and protein fibers suspended in a viscous ground substance. Structurally, all connective tissues contain cells that are embedded in an extracellular matrix stabilized by proteins. It makes up a template of the embryonic skeleton before bone formation. 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). Neuron 40x . Dense regular connective tissue is mainly made up of type I collagen fibers. Dense regular: Tendons and ligaments are examples of dense regular connective tissue. Erythrocytes, or red blood cells, transport the gases oxygen and carbon dioxide. The ECM is composed of a moderate amount of ground substance and two main types of protein fibers: elastic and reticular fibers. Without mineral crystals, bones would flex and provide little support. There is a small amount of epithelium on the top (black) and some adipose tissue at the bottom and lower left (very light). elastic tissue. The matrix plays a major role in the functioning of this tissue. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. Cartilaginous tissue is avascular, thus all nutrients need to diffuse through the matrix to reach the chondrocytes. The matrix contains very few blood vessels. White adipose tissue can be found protecting the kidneys and cushioning the back of the eye. B. Dense Regular Connective Tissue A Examine and draw a representative view from the microscope slide of dense regular connective tissue (white fibrous connective tissue) A For each slide, note the total magnification, the cell type (for this main class) A Name and Label the matrix, the fiber or fibers, and any other cells if present. In this way, specialized lymphatic capillaries transport absorbed fats away from the intestine and deliver these molecules to the blood. 4. Under the microscope, a tissue specimen shows cells located in spaces scattered in a transparent background. 2) Dense Irregular Connective Tissue They are dense regular connective tissue and dense irregular connective tissue. Dense regular connective tissue provides connection between different tissues in the human body. 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. In this variety of dense connective tissue, the fibers are densely packed and are arranged parallel to each other. These serve to hold organs and other tissues in place and, in the case of adipose tissue, isolate and store energy reserves. The most abundant cell in connective tissue proper is the fibroblast. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver (Figure \(\PageIndex{4}\)). Cartilage contains chondrocytes and is somewhat flexible. Dense connective tissue. Fibers interwoven in different directions to pull in different directions. Cytokines recruit other cells of the immune system to infected sites and stimulate their activities. Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. The fragmented nature of the tissue (the slits seen throughout) is an artifact of preparing the tissue for sectioning as a microscopic slide. Nutrients, salts, and wastes are dissolved in the liquid matrix and transported through the body. The collagen fibers in dense regular connective tissue are bundled in a parallel fashion. View the University of Michigan Webscope (http://virtualslides.med.umich.edu/Histology/ In all cases, overuse of the joint causes a microtrauma that initiates the inflammatory response. It is found in areas of the body where large amounts of tensile strength are required, like in ligaments, tendons and aponeurosis. 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. Neuron 400x . Dense connective tissue proper is richer in fibers and may be regular, with fibers oriented in parallel as in ligaments and tendons, or irregular, with fibers oriented in several directions. As a consequence, it displays greater resistance to stretching. Lastly, found in between the deep fascia and the serous membranes, is the subserous fascia. Each adipose cell, or adipocyte, has its cytoplasm stretched around a … Q. Connective tissue is made of which three essential components? Adopted a LibreTexts for your class? 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. 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 … Which of the following correctly describes a common feature of all structures labeled A-D in the figure? Dense connective tissue, also called dense fibrous tissue, is a type of connective tissue with fibers as its main matrix element. reticular. Lymph contains a liquid matrix and white blood cells. The threadlike fibers labeled e are elastic fibers. Reticular fibers are also formed from the same protein subunits as collagen fibers; however, these fibers remain narrow and are arrayed in a branching network. Dense connective tissue is dense because of the high proportion of fibers that run parallel to each other. The ligaments in the vocal folds and between the vertebrae in the vertebral column are composed of dense regular elastic tissue. This type of tissue gives the walls of large arteries and respiratory passages strength and the ability to regain original shape after stretching. elastic cartilage. Connective tissues provide support and assist movement, store and transport energy molecules, protect against infections, and contribute to temperature homeostasis. Create. e.g. In dense irregular connective tissue, the direction of fibers is random. Bone is the hardest connective tissue. An easy and convenient way to make label is to generate some ideas first. In adults, new connective tissue cells originate from the ________. Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. These tissues are widely distributed and serve as a universal packing material between other tissues. 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. Histology Learning System [ Connective Tissue, dense regular connective tissue, transverse] Q. Ligaments connect bones together and withstand a lot of stress. Dense connective tissue is reinforced by bundles of fibers that provide tensile strength, elasticity, and protection. Clusters of mesenchymal cells are scattered throughout adult tissue and supply the cells needed for replacement and repair after a connective tissue injury. Connective tissue in the tendon does not have abundant blood supply and heals slowly. ... dense regular tissue. What type of connective tissue should you expect ligaments to contain? This is not where connective tissue roles end. The many mitochondria in the cytoplasm of brown adipose tissue help explain its efficiency at metabolizing stored fat. Examples of typical dense regular and dense irregular connective tissues consisting primarily of collagen fibers are shown in (Figure \(\PageIndex{5}\)). 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 latter is sub-divided into two categories — regular and irregular — that are classified based on the arrangement of the tissue's fibers. In loose connective tissue, the fibers are loosely organized, leaving large spaces in between. Dense Regular Connective Tissue. Feb 18, 2015 - dense irregular connective tissue labeled - Google Search The collagen fibers (cf) are parallel to … 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. Young athletes, dancers, and computer operators; anyone who performs the same movements constantly is at risk for tendinitis. EXERCISE 8 - Dense regular connective tissue Step1: Why is the orientation of the fibers important for the function of the tissue? Discuss how blood fulfills this role. Cells circulate in a liquid extracellular matrix. Connective tissue proper includes loose connective tissue and dense connective tissue. Dense Regular Connective 100x . Lymphatic capillaries are extremely permeable, allowing larger molecules and excess fluid from interstitial spaces to enter the lymphatic vessels. Under the microscope, tissue samples appear clear. 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. Structures A, B, C, and D are all various types of glands. ... dense connective tissue types. Dense Regular Connective 40x . Dense connective tissue contains more collagen fibers than does loose connective tissue. This layer of areolar connective tissue serves as an anchor for the serous membranes to surrounding superficial structures. Ligaments and tendons are … Strong white flexible structures. Other cells move in and out of the connective tissue in response to chemical signals. 4 Review Sheet: Exercise 6 Classification of Tissue Name Date _____ 18. The histology of transverse tissue from long bone (Figure \(\PageIndex{7}\)) shows a typical arrangement of osteocytes in concentric circles around a central canal. Students may have trouble locating the appropriate tissue on slides with multiple tissue types. 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. The extracellular matrix contains fluid, proteins, polysaccharide derivatives, and, in the case of bone, mineral crystals. Transport of fluid, nutrients, waste, and chemical messengers is ensured by specialized fluid connective tissues, such as blood and lymph. Connective tissues separate and cushion organs, protecting them from shifting or traumatic injury. dense regular connective tissue which is found in tendons and ligaments, and is shown below. 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. It is also in the sclera and in the deeper skin layers. Macrophages, mast cells, lymphocytes, and plasma cells are found in connective tissue proper but are actually part of the immune system protecting the body. Legal. In contrast, white fat adipocytes store lipids as a single large drop and are metabolically less active. Recall from the first section of this chapter that membranes form all the body linings and are made up of epithelial tissues with a layer of underlying connective tissue. The game is over for now. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. All connective tissues derive from the mesodermal layer of the embryo. Surgical repair of a tendon is painful. dense fibrous connective tissue; regular, tendon, 250x at 35mm. The external ear contains elastic cartilage. It provides protection to internal organs and supports the body. Dense Regular Connective Tissue- Attachment- Tendons and Ligaments- Fibroblasts. Dense regular connective tissue: In this type of tissue, the collagen fibres are densely packed, and arranged in parallel. There are two major categories of dense connective tissue: regular and irregular. Median response time is 34 minutes and may be longer for new subjects. 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. Tug gently at your ear lobes, and notice that the lobes return to their initial shape. anatomy tissue #2 Learn with flashcards, games, and more — for free. It fills the spaces between muscle fibers, surrounds blood and lymph vessels, and supports organs in the abdominal cavity. Many different cells contribute to the formation of connective tissues. Dense regular connective tissue is found in tendons or ligaments where the collagen fibers are all oriented in the same direction, (A-19, PTAH [2.5x, 10x, 20x, 40x] [10x, 20x, 40x-labeled]). Dense Regular Connective Tissue This section of TENDON shows the orderly and linear organization of the collagen fibers of dense regular connective tissue. Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Dense Regular Connective 400x . You can't see the rest of the fibroblast cell because it stains the same color as the collagen fibers. Osteocytes, bone cells like chondrocytes, are located within lacunae. Tendinitis is routinely diagnosed through a clinical examination. Dense Irregular Connective Tissue Labeled Keywords: densen, dense_rank, densepose, densen dm-10, dense перевод, dense subgraph, dense_rank oracle, densel torrington vk, Dense irregular connective tissue , which is made up of elastic fibers and a type of protein fiber called collagen , provides protection to the tissues or organs it surrounds. Connective Tissue Proper – Dense Regular Connective Tissue Function – Provide high tensile strength in one direction. The collagen fibers are densely packed together and arranged in parallel to each other. collagenous fibers & tendons have high tensile strength - dense regular connective tissue fotografías e imágenes de stock She issues a stern warning about the risk of aggravating the condition and the possibility of surgery. 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. The matrix is the most abundant feature for loose tissue although adipose tissue does not have much extracellular matrix. Why does an injury to cartilage, especially hyaline cartilage, heal much more slowly than a bone fracture? Like blood cells, mast cells are derived from hematopoietic stem cells and are part of the immune system. Gardenwoodresort. The three main types of cartilage tissue are hyaline cartilage, fibrocartilage, and elastic cartilage (Figure \(\PageIndex{6}\)). Crowded between the collagen fibers are rows of fibroblasts, fiber-forming cells, that generate the fibers. Dense Connective Tissues i). Navigation best viewed on larger screens. OpenStax Anatomy & Physiology (CC BY 4.0). Tendinitis is the inflammation of a tendon, the thick band of dense regular connective tissue that attaches a muscle to a bone. 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