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Tissues ((a.hyaline cartilage (amorphous (Chondroitin and glucosamine)…
Tissues
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- Muscle fibers are contractile [ i.e. they change their shape(shorten) to cause their attachments to move}
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a. Structure: long thin cells (fibers) with many nuclei; alternating areas of light & dark (striations)
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a. structure:network of cells with one centrally located nucleus; intercalated discs(where 2 cells meet) striations
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locations=embryotic skeleton costal cartilages, cartilage of the nose, trachea and larynx
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locations=external ear, epiglottd
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locations=intervetable discs, pubic, symphis
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hard, calcified matrix with collagen fibers 9tensile strength) and cells=osteocyes within lacunae)
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functions=preotection, support, movement, calcium store and hematopoiesis
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- Aredar CT: gel-like matrix with fibroblasts, macrophages, mast cells and collagen and elastic fibers
location=beneath epithelium, covering ventral organs;
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closely packed adipocytes (fat cells) with nuclei pushed to one side within matrix(resembles singlet rings)
location= under skin ( as subcutaneus layer) around kidneys, eyeballs, & breasts
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location=basement membranes and lymphatic organs(lymph nodes, thymus, spleen)
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location=tendons,ligaments
funtions=attachment, tensile strength
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location=dermis of skin, heart valves
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Epithelial Membranes. four common types: 1.cutaneous membrane:a.skin b.consists of keratinized stratified squamous ET firmly attached to a thick layer of dense irregular CT
- Mucous Membrane(mucosae): a.line body cavities that open to the outside;
b.include lining of digestive, respiratory and urinary tract;
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d. consist of a layer of epithelium(varies depending upon location) firmly attached to a layer of loose areolar CT
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c. secrete a thin watery fluid called SEROUS FLUID into the cavity between the membranes; function=lubrication;
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a. joints (articulations) that allow free movement are surrounded by a fibrous capsule and lined by a synovial membrane.
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- Serous Membrane(serosae): a. are found in closed ventral body cavities;
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c. found in skin,lungs, and blood vessel.
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- once the matrix has been formed, these "blast" cells assume their less active role as "cytes" but can be reactivated if needed
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