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Basic Contractile Unit of Muscle

Basic Contractile Unit of Muscle

FIGURE 1 (Left) The attachment of a skeletal muscle. Contractions of the muscle result in movement of the arm, thus lifting the weight. (Center) Relaxation of cardiac muscle (top) allows the heart to fill with blood. Contraction of cardiac muscle (bottom) reduces the size of the ventricals, thus expelling blood into the pulmonary artery and the aorta. (Right) A small artery whose wall is comprised mostly of smooth muscle. Relaxation (top) and contraction (bottom) of the muscle increases and decreases, respectively, the diameter of the artery, thus altering the resistance to blood flow.

Psychology Of Weight Loss And Management

Psychology Of Weight Loss And Management

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