Which layer is the muscular middle layer of the uterus?

Which layer is the muscular middle layer of the uterus?

• A. Endometrium
• B. Myometrium
• C. Perimetrium
• D. Epimetrium

Answer: (B)

The uterus has three layers: an inner lining that thickens and sheds (the endometrium), a thick muscular middle layer (the myometrium), and an outer covering (the perimetrium). The muscular middle layer is the myometrium, made of smooth muscle arranged in multiple orientations to generate the strong contractions needed during menstruation and especially during childbirth. The endometrium is the lining that supports implantation and later sheds, while the outer layer covers the uterus. Epimetrium is another term sometimes used for the outer covering, not the muscular layer. So the muscular middle layer is the myometrium.

The uterus has three layers: an inner lining that thickens and sheds (the endometrium), a thick muscular middle layer (the myometrium), and an outer covering (the perimetrium). The muscular middle layer is the myometrium, made of smooth muscle arranged in multiple orientations to generate the strong contractions needed during menstruation and especially during childbirth. The endometrium is the lining that supports implantation and later sheds, while the outer layer covers the uterus. Epimetrium is another term sometimes used for the outer covering, not the muscular layer. So the muscular middle layer is the myometrium.