Which layers form the uterus from innermost to outermost?

Which layers form the uterus from innermost to outermost?

• A. Endometrium, Myometrium, Perimetrium
• B. Endometrium, Myometrium, Serosa
• C. Endometrium, Stroma, Perimetrium
• D. Endometrium, Myometrium, Endocervix

Answer: (A)

The uterus has three layered walls arranged from inside to outside: the endometrium lining the cavity, the myometrium a thick muscular layer, and the outer layer called the perimetrium, which is the serous covering derived from the peritoneum. The endometrium thickens and sheds during the cycle, the myometrium powers contractions, and the perimetrium provides protection and a surface for peritoneal contact. While some texts use the term serosa for the outer covering, the standard anatomical sequence here is endometrium, myometrium, then perimetrium. The other options mix in tissue components that aren’t separate layers of the uterus (stroma is part of the endometrium, endocervix is part of the cervical canal), or use a term that isn’t the designated outer layer for this context.

The uterus has three layered walls arranged from inside to outside: the endometrium lining the cavity, the myometrium a thick muscular layer, and the outer layer called the perimetrium, which is the serous covering derived from the peritoneum. The endometrium thickens and sheds during the cycle, the myometrium powers contractions, and the perimetrium provides protection and a surface for peritoneal contact. While some texts use the term serosa for the outer covering, the standard anatomical sequence here is endometrium, myometrium, then perimetrium. The other options mix in tissue components that aren’t separate layers of the uterus (stroma is part of the endometrium, endocervix is part of the cervical canal), or use a term that isn’t the designated outer layer for this context.