In certain regions of the GI tract, the muscles of the muscularis act as _____, and are capable of closing to prevent movement of food or liquid through the tract.

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Anatomy refers to the internal and external structures of the body and their physical relationships, whereas physiology refers to the study of the functions of those structures.


1. In certain regions of the GI tract, the muscles of the muscularis act as _____, and are capable of closing to prevent movement of food or liquid through the tract.