Which is a physiological description rather than an anatomical one?

A. The muscles of the thigh are composed of skeletal muscle tissue.
B. The walls of blood capillaries are composed of a thin epithelium.
C. There are fenestrations (openings) in the epithelial cells of capillary walls.
D. The muscles of the intestinal wall contract slowly and involuntarily.
E. The esophageal wall includes a middle layer of dense irregular connective tissue.


Answer: D

Anatomy & Physiology

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