The Muscle Layers for Segmentation and Peristalsis Are Located in the Muscularis

question 81

True/False

The muscle layers for segmentation and peristalsis are located in the muscularis externa.

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Definitions:

Polychaete

A member of the class Polychaeta, these are marine annelid worms characterized by their segmented bodies, many with paired, paddle-like appendages called parapodia for movement and breathing.

Oligochaete

A class of annelids comprising earthworms and related species, characterized by having few setae (bristles) per segment.

Bivalvia

Bivalvia is a class of marine and freshwater mollusks with bodies enclosed by a two-part hinged shell, including clams, oysters, mussels, and scallops.

Two Shells

Refers to bivalves, a class of aquatic mollusks with bodies enclosed by a pair of hinged shells.