NUTRITION
DIGESTIVE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Voluntary muscles
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Physical movement
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Peristalsis
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Skeletal muscle contractions
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Detailed explanation-1: -Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach.
Detailed explanation-2: -Peristaltic waves push the swallowed bolus down the esophagus. In the stomach, peristalsis churns swallowed food, mixing it with gastric juices. These mechanical and chemical actions further break down food into a substance called chyme.
Detailed explanation-3: -The esophagus: Food travels down a muscular tube in the chest called the esophagus (ih-SAH-fuh-gus). Waves of muscle contractions called peristalsis (per-uh-STALL-sus) force food down through the esophagus to the stomach.
Detailed explanation-4: -In the oesophagus, the bolus is moved along by rhythmic contractions of the muscles present in its walls. For a medium-sized bolus, it takes about 5–8 seconds to reach the stomach.