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| a thin sleeve of loose connective tissue that surrounds each muscle fiber. It creates room for blood capillaries and nerve fibers to reach every muscle fiber, ensuring that no muscle cell is without stimulation and nourishment, it also provides the extracellular chemical environment for the muscle fiber and its associated nerve ending. |
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| a thicker connective tissue sheath that wraps muscle fibers together in bundles called fascicles, usually carry the larger nerves and blood vessels as well as stretch receptors called muscle spindles. |
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| bundles of muscle fibers visible to the naked eye. |
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| a fibrous sheath that surrounds the entire muscle. On its outer surface, the epimsyium grades in the fascia, on its inner surface it issues projections between the fascicles to form the perimysium. |
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| a sheet of connective tissue that separates neighboring muscles or muscle groups from each other and from the subcutaneous tissue. |
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| thick in the middle and tapered at each end, the biceps brachii of the arm and the gastrocnemius of the calf are examples |
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| thick in the middle and tapered at each end, the biceps brachii of the arm and the gastrocnemius of the calf are examples |
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| fairly uniform width and parallel fascicles |
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| Triangular (Convergent) muscles |
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fan-shaped...broad at the origin and converging toward a narrower insertion.
EX: pertoralis major in the chest and the temporalis on the side of the head. |
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| feather-shaped; their fascicles insert obliquely on a tendon that runs the length of the muscle, like the shaft of a feather. |
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| (sphincters) form rings around certain body openings |
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| muscle ends conspicuously short of its bony destination, and the gap is bridged by a fibrous band or sheet called a tendon. |
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| groups of tendons from separate muscles pass under a band of connective tissue |
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| Direct (fleshy) attachment |
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| little separation between muscle and bone that to the naked eye, the red muscular tissue seems to emerge directly from the bone |
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| bony site of attachment at the relatively stationary end of a contracted muscle |
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| the attachment site of a contracted muscle at its more mobile end is called the insertion |
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| the thicker middle region between the origin and insertion. |
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| the muscle that produces most of the force during a particular joint action |
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| a muscle that aids the prime mover |
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| a muscle that opposes the prime mover |
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| a muscle that prevents a bone from moving |
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| entirely contained within a particular region, having both its origin and insertion there. |
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| acts upon a designated region but has its origin elsewhere. |
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| refers to the identity of the nerve that stimulates it. |
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| muscles organized into spaces separated by fasciae |
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