Which type of muscle controls the opening and closing of passages into and out of the body?
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Controls voluntary movement of the body. Responsible for involuntary contractions of blood vessels and hollow organs such as the stomach, bladder, uterus. Located in the heart and contracts to make the heart pump. Composed of long muscle fibers with multiple nuclei and visible striations.
Adi S.
Smooth muscle is distributed throughout the body and is more variable in function than other types of muscle. There are two types of involuntary muscle. One type is the most common type found in the walls of small blood vessels, urinary bladder, uterus, and small intestines. The other type is found in the walls of the larger blood vessels, the bronchioles of the lungs, and the capsules of the spleen.
Sri K.
small intestines internal anal sphincter oral cavity upper esophageal sphincter orbicularis oris stomach ileocecal valve large intestine pyloric sphincter skeletal muscle external anal sphincter smooth muscle The acts as the first sphincter of the digestive tract by voluntarily controlling entrance into the The separates the pharynx from the esophagus and regulates the passage of food into the esophagus. At the terminal end of the esophagus is the ,which controls the entrance of food into the The regulates the movement of food from the stomach to the The junction of the large and small intestines is marked by the which regulates movement into the The involuntarily controlled is composed of that relaxes at the onset of defecation. The final step in defecation is the voluntary relaxation of the which is composed of
Madhur L.
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