Anatomy and Chemistry Basics
Muscle Tissue
A skeletal muscle consists of numerous muscle cells called muscle fibers. Three layers of connective tissues surround these fibers to form a muscle. These and other connective tissues associated with muscles follow:
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The endomysium is the connective tissue that surrounds each muscle fiber (cell).
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The perimysium encircles a group of muscle fibers, forming a fascicle.
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The epimysium encircles all the fascicles to form a complete muscle.
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A tendon is a cordlike extension of the preceding three linings. It extends beyond the muscle tissue to connect the muscle to a bone or to other muscles.
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An aponeurosis is a flat broad extension of the three muscle linings and serves the same function as a tendon.
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The deep fascia surrounds the perimysium and encloses or lines other nearby structures such as blood vessels, nerves, and the body wall.
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The superficial fascia (hypodermis or subcutaneous layer) lies immediately below the skin. The superficial fascia merges with the deep fascia where the surfaces of the skin meet.
