Which layer of the uterus is composed of smooth muscle that contracts to expel uterine contents?
A) Perimetrium
B) Myometrium
C) Endometrium
D) None of these are correct.

Question

Quizplus · Accepted Answer

The perimetrium is the outermost layer of the uterine wall, and it may also be called the visceral peritoneum. The myometrium is the thickest layer of the uterine wall. It is composed of smooth muscle that contracts to expel uterine contents, whether it be the lining that is shed each month or a fetus during birth. The endometrium is the lining of the uterus. It has two sublayers: the stratum basalis and the stratum functionalis. The stratum functionalis is the superficial two-thirds of the lining that is typically shed each month. The stratum basalis is the deep one-third of the lining. Its purpose is to generate a new stratum functionalis each month.

Which Layer of the Uterus Is Composed of Smooth Muscle