BIOL 1050H Chapter Notes - Chapter 10: Brachialis Muscle, Vastus Intermedius Muscle, Biceps Femoris Muscle
6 Dec 2016
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Movement: of us, of body contents (air, blood, etc), communication. Stability: maintain posture (resist pull of gravity and stabilize joints) Control of body openings and passages: (eating, light admission to eye, internal muscular rings control materials, sphincters) Heat production: produce 85% of body heat (vital to metabolism) Endomysium: thin sleeve of loose connective tissue surrounding each muscle fiber. Perimysium: thicker connective sheath wrapping around muscle fibers in bundles called fascicles. Fascia: sheet of connective tissue separating neighboring muscles/muscle groups from each other and from the subcutaneous tissue. Thick in middle and tapered on each end. Broad on one end, narrow on other (fan shaped) Relatively strong bc large number of fibers in wider area. Fascicles insert obliquely on a tendon (feather shaped) Multipennate: fascicles all connect at a single point. Group of functional related muscles as well as supplying nerves and blood vessels (enclosed and separated by connective fascia)
