You can see it here in green. Connective Tissue – Fibers and Ground Substance, http://virtualslides.med.umich.edu/Histology/Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml, https://www.studyblue.com/notes/note/n/histology/deck/15076281. Can you name the 10 tissue types shown in the histology slides? http://email@example.com@7.1. The cells are called chondrocytes (ch) and the spaces in the cartilage in which they are found are called lacunae. Both are fluid, rather than solid, and both lack the network of extracellular protein fibers found in the other types of connective tissue. Total Points. As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Blood is no exception, but its cells float freely in a liquid matrix. Embedded within the cartilage matrix are chondrocytes, or cartilage cells, and the space they occupy are called lacunae (singular = lacuna). Areolar connective tissue is best identified under the microscope due to its lack of structure the fibers are randomly arranged. Identify and distinguish between the types of connective tissue: loose, dense, cartilage, bone, and blood, Explain the functions of connective tissues, Loose Connective Tissue – large amounts of ground substance and fewer fibers, Dense Connective Tissue – large amounts of fibers and less ground substance, Cartilage – specialized cells called chondrocytes are within the matrix (cartilage cells), Bone – strongest connective tissue with little ground substance, hard matrix of calcium and phosphorous and specialized bone cells called osteocytes, Blood – fluid connective tissue, no fibers – only ground substance (plasma) and cells (red, white, and platelets). Bone is a highly vascularized tissue. Dense regular connective tissue contains densely packed collagen fibers that run in the same direction. It contains all the cell types and fibers previously described and is distributed in a random, web-like fashion. Areolar connective tissue is made of cells and extracellular matrix ("extra-" means "outside", so the extracellular matrix is material that is outside of the cells). The external ear contains elastic cartilage. 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. Game Points. (Note: Erythrocytes - red blood cells; have hemoglobin; don't have nuclei because they lose it when made from bone marrow. Bone’s rigid extracellular matrix contains mostly collagen fibers embedded in a mineralized ground substance containing hydroxyapatite, a form of calcium phosphate. It contains all three types of fibers (collagen, elastin, and reticular) with much ground substance and fibroblasts. All of these fiber types are embedded in ground substance. The distinctive appearance of cartilage is due to the presence of polysaccharides called chondroitin sulfates, which bind with ground substance proteins to form proteoglycans. In this way, specialized lymphatic capillaries transport absorbed fats away from the intestine and deliver these molecules to the blood. Study Microscopic Images of Tissues Flashcards Flashcards at ProProfs - This set of image-based flashcards gives medical students the Microscopic Images of Tissues. Activity 2: Examining Connective Tissue Under the Microscope (p. 82) All connective tissues consist of cells located within a matrix. It fills the spaces between muscle fibers, surrounds blood and lymph vessels, and supports organs in the abdominal cavity. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. Connective tissue - blood. The knee and jaw joints and the the intervertebral discs are examples of fibrocartilage. Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of ground substance, and protein fibers. Specialized cells in connective tissue defend the body from microorganisms that enter the body. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver (Figure 4.8). This type of tissue is used extensively throughout the body for fastening down the skin, membranes, blood vessels and nerves as well as binding muscles and other tissues together. If you find a random arrangement of tissue under the microscope with spaces, it is most likely areolar tissue you are viewing. 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. It occurs in small, elongated … The different types of connective tissue are so diverse, there is no one set of characteristics that encompasses all the different types. Organization of Cells. Both tissues have a variety of cell types and protein fibers suspended in a viscous ground substance. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. Areolar tissue is the most common loose connective tissue you have, found ALL over your body, 02:59 just under your epithelial tissue, and wrapped around your organs. Connective tissue - Connective tissue - Extracellular fibres: The fibrous components are of three kinds: collagenous, elastic, and reticular. Elastic cartilage contains elastic fibers as well as collagen and proteoglycans. Are you good at identifying the different tissues? Platelets are cell fragments involved in blood clotting. This arrangement gives the tissue greater strength in all directions and less strength in one particular direction. Areolar Tissue. In this photo of areolar connective tissue, nuclei of cells are stained but the cytoplasm is pale and not distinguishable. Figure 4.7. Sources Hole's Essentials of Human Anatomy and Physiology. View the University of Michigan Webscope at http://virtualslides.med.umich.edu/Histology/Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml to explore the tissue sample in greater detail. Erythrocytes, red blood cells, transport oxygen and some carbon dioxide. Dense connective tissue contains more collagen fibers than does loose connective tissue. Ground substance is an aqueous gel of glycoproteins and proteoglycans that occupies the space between cellular and fibrillar elements of the connective tissue. Image of blue, connective, loose - 130916821 The other part, the parenchyma, consists of the cells that perform the function of the tissue or organ. Examining Connective Tissue Under The Microscope. You need to get 100% to … It consists of narrow spindle-shaped cells with a single, centrally located nucleus. The amount and structure of each component correlates with the function of the tissue, from the rigid ground substance in bones supporting the body to the inclusion of specialized cells; for example, a phagocytic cell that engulfs pathogens and also rids tissue of cellular debris. Epithelial Tissue: Epithelial tissue line the cavity and surfaces of organs and blood vessels throughout the animal body. 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