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Different types of muscle
Cardiac muscle tissue forms the bulk of the wall of the heart. Like skeletal muscle tissue, it is striated
(the muscle fibers contain alternating light and dark bands (striations) that are perpendicular to the
long axes of the fibers). Unlike skeletal muscle tissue, its contraction is usually not under
conscious control (involuntary).
Smooth muscle tissue is located in the walls of hollow internal structures such as blood
vessels, the stomach, intestines, and urinary bladder. Smooth muscle fibers are usually
involuntary (not under conscious control), and they are nonstriated (smooth). Smooth muscle
tissue, like skeletal and cardiac muscle tissue, can undergo hypertrophy. In addition, certain
smooth muscle fibers, such as those in the uterus, retain their capacity for division and can
grow by hyperplasia.
involuntary muscle - a muscle that contracts without conscious control and found in
walls of internal organs such as stomach and intestine and bladder and blood vessels
(excluding the heart)
Voluntary Muscles - Muscles such as striated muscle, normally controlled by individual volition…read more


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