Which of the following wall layers of the uterus is shed during menstruation?Multiple ChoiceEndometriumMyometriumPerimetrium

1. ### Break Down the Problem

The question is asking which layer of the uterus is shed during menstruation. The options provided are three layers of the uterus: Endometrium, Myometrium, and Perimetrium.

2. ### Relevant Concepts

• Endometrium: The inner lining of the uterus that thickens during the menstrual cycle and is shed during menstruation.
• Myometrium: The muscular middle layer of the uterus that aids in contraction.
• Perimetrium: The outer serous layer of the uterus that provides support but doesn't play a role in menstruation.

3. ### Analysis and Detail

• During menstruation, the cyclical hormonal changes lead to the shedding of the Endometrium. This layer is specialized for implantation of the embryo and supports the early stages of pregnancy. If fertilization does not occur, this layer is sloughed off and expelled through the vagina.
• The Myometrium and Perimetrium are not involved in this process. The Myometrium functions mainly in contractions during labor, while the Perimetrium serves as a protective outer layer.

4. ### Verify and Summarize

Given the definitions and functions of the layers of the uterus, it is clear that the Endometrium is the correct answer because it is the only layer involved in the shedding process during menstruation.

Final Answer

Endometrium