Learn about Three Types of Muscle in this educational video from dizzo95.
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Male Speaker: There are 3 types of muscle, each with a different structure and function. Skeletal muscle produces the most powerful contractions and is essentially involved in performing the body's movements. Skeletal muscle is under conscious control and is therefore described as voluntary. It is composed of cells elongated up to 12 inches in length, containing many minute myofibrils and nuclei. It can contract and relax rapidly, but it easily fetid, smooth muscle is found in the arteries and in the digested and urinary tracks and performs the slow long term contractions needed to maintain these systems. Smooth muscle is made up of elongated cells arranged in bundles each with the single nucleus, within the intestines and inner circular band produces ring like constrictions and an outer longitudinal band produces weight like motions. Controlled by the autonomic system smooth muscle contraction is involuntary. Cardiac muscle found exclusively in the heart continuously generates very strong contractions and rarely tires and its task of pumping blood throughout the body. It has a build in rhythm of contraction but is regulated by the hearts pacemaker. Cardiac muscle forming the heart is made up of branch to cells containing many nuclei. It occurs as thick spiral bands around the ventricles of the heart.
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