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Week 3. No bones about it; your bones can’t do much without muscles to move them. You have three major types of muscle tissue known as skeletal, smooth, and cardiac muscle. Learn about all 11 organ systems with the Amoeba Sisters! http://www.youtube.com/watch?v=nnjmrrQ6xOs, w3

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SMOOTH MUSCLE (400X) is non-striated, and the individual muscle fibers are very thin and spindle-shaped. The nucleus of each muscle cell is visible here as elongated purple structures.

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Skeletal muscle is responsible for all voluntary movements, such as running . Also involved in involuntary actions, such as breathing, shivering and maintaining posture. Cardiac muscle is responsible for the beating action of the heart. Smooth muscle creates the movement in many hollow internal organs, such as the gut, bladder, and blood vessels, and is under the control of the autonomic nervous system. All 3 muscle types use the same sliding filament mechanism. (6/18/2013) Anatomy…

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Smooth muscle tissue is formed in the walls of hollow organs such as the stomach, uterus and blood vessels. IT constricts and enlarge to propel things.