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Unformatted text preview: The deep fascia surrounds the epimysium and encloses or lines other nearby structures such as blood vessels, nerves, and the body wall. 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. Within a myofibril, actin and myosin filaments are parallel and arranged side by side. The overlapping filaments produce a repeating pattern that gives skeletal muscle its striated appearance. Each repeating unit of the pattern, called a sarcomere, is separated by a border, or Z disc (Z line), to which the actin filaments are attached. The myosin filaments, with their protruding heads, float between the actin, unattached to the Z disc....
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- Spring '10