sarcomeres is the basic structural and functional unit of skeletal muscle.
sarcomeres is the basic structural and functional unit of skeletal muscle.
the basic structural and functional unit of skeletal muscle is the?
sarcomeres
section::::specific roles and functions.:function in skeletal muscle contraction.









































skeletal muscle is composed of large, multi-nucleated cells (muscle fibers). each muscle fiber is packed with longitudinal arrays of myofibrils. myofibrils are composed of repeating protein structures or sarcomeres, the basic functional unit of skeletal muscle. the sarcomere is a highly structured protein array, consisting of interdigitating thick and thin filaments, where the thin filaments are tethered to a protein structure, the z-line. the dynamic interaction between the thick and thin filaments results in muscle contraction.
tropomyosin
skeletal muscle includes skeletal muscle fibers, blood vessels, nerve fibers, and connective tissue. skeletal muscle is wrapped in epimysium, allowing structural integrity of the muscle despite contractions. the perimysium organizes the muscle fibers, which are encased in collagen and endomysium, into fascicles. each muscle fiber contains sarcolemma, sarcoplasm, and sarcoplasmic reticulum. the functional unit of a muscle fiber is called a sarcomere.









































each myofiber is composed of actin and myosin myofibrils repeated as a sarcomere.









































based on their contractile and metabolic phenotypes, skeletal muscle can be classified as slow-oxidative (type i) or fast-oxidative (type ii).









































section::::structure.:cardiac muscle.
striated muscle tissue