Which type of muscle tissue is found inside hollow organs, such as the stomach, intestines and blood vessels?

A) multi-unit skeletal
B) skeletal
C) cardiac
D) smooth

Smooth muscle tissue is found in the walls of hollow organs and blood vessels, where it helps to control involuntary movements such as the contraction of the stomach and intestines during digestion, and the diameter of blood vessels. Multi-unit skeletal muscle tissue is found in small muscles such as those controlling the movement of the eye, while cardiac muscle tissue is found only in the heart. Skeletal muscle tissue is generally attached to bones and responsible for voluntary movement and locomotion.