Sphincter: This is a ring-shaped muscle that regulates flow between compartments in the digestive tract.
Sphincter: A muscular ring that controls the passage of substances between different parts of the digestive canal.
| Front | sphincter |
|---|---|
| Back | A ringlike valve, consisting of modified muscles in a muscular tube, that regulates passage between some compartments of the alimentary canal. |
Tags: ch.41
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