Peristalsis describes the involuntary wave of muscle contractions that happen naturally in your digestive tract. This automatic bodily function physically moves food and drink through your body ...

The subject swallows a mouthful of barium sulfate, which is then propelled down the esophagus and into the stomach by a peristaltic contraction wave.

Save guides, add subjects and pick up where you left off with your BBC account. Heart Rate Increase in rate of contraction of cardiac muscle - cardiac output increases Decrease in rate of ...