Identify and describe the connective tissue wrappings of muscle : fascia, epimysium, perimysium, endomysium
Question
Identify and describe the connective tissue wrappings of muscle : fascia, epimysium, perimysium, endomysium
Solution
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Fascia: This is a broad term for the connective tissue that surrounds muscles, groups of muscles, blood vessels, and nerves. It binds some structures together, while allowing others to slide smoothly over each other. It's made up of fibrous connective tissue containing closely packed bundles of collagen fibers oriented in a wavy pattern parallel to the direction of pull.
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Epimysium: This is a layer of dense irregular connective tissue which surrounds the whole muscle. It protects muscles from friction against other muscles and bones. It is continuous with fascia and other connective tissue wrappings of muscle including perimysium and endomysium.
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Perimysium: This is a sheath of connective tissue that groups muscle fibers into bundles (anywhere between 10 to 100 or more) or fascicles. It also provides a pathway for nerves and blood vessels to reach the muscle fibers.
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Endomysium: This is a thin layer of areolar connective tissue that ensheathes each individual muscle fiber. It also contains capillaries and nerves supplying the muscle cells. The endomysium allows for the conduction of electrical signals and contains stem cells that repair damage to the muscle tissue.
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