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Caption: Peristalsis is an involuntary muscle contraction that propagates the length of a hollow organ (esophagus, stomach, small intestine, colon), under the effect of a stimulus, such as swallowing or filling the stomach or intestines. The speed of peristalsis varies depending on the organs.
Credit: Album / Universal Images Group
Image size: 1840 × 5123 px | 27.0 MB
Print size: 15.6 × 43.4 cm | 724.4 × 2016.9 in (300 dpi)