Question

The layer of the uterine wall that exhibits strong contractions during delivery of the baby is
A. Myometrium
B. Mesometrium
C. Perimetrium
D. Endometrium.

Answer 1

Hint: Most mammals comprise the uterus as the secondary sex organ of the reproductive system of the female. The lower end of the uterus is called the cervix and the upper end is Known as the fundus. The uterine wall is composed of three layers. These are endometrium, myometrium, and perimetrium.

Complete answer: Myometrium: myometrium is found between the perimetrium and the endometrium, thus it is the middle layer of the uterus. Myometrium comprises smooth muscle that is composed of od actin and myosin protein. The smooth muscle of the uterine wall is called uterine myocytes. The major function of the myometrium is to take part in the delivery of the baby, by pushing the baby out.
Mesometrium: Uterus possess a mesentery organ known as myometrium. Except the ovary and the adjacent region of the fallopian tube, the mesometrium comprises most of the uterine ligaments. It is responsible for providing support to the uterus.
Perimetrium: perimetrium is the outer layer of the uterus that is derived from the visceral peritoneum. Perimetrium is responsible for covering the fundus and cervix both anteriorly and posteriorly.
Endometrium: the inner layer of the uterine wall is called the endometrium. Endometrium comprises three layers, named stratum basalis, stratum spongiosum, and stratum compactum. Endometrium is involved in the monthly cycle of the female. During menstruation endometrium sheds and bleeding occur.
So, the correct answer is “Option A”.

Note:
The contraction of smooth muscles of the uterus is called uterine contraction. The thickest layer of the uterine wall is the myometrium that is responsible for the contraction of the uterus. There are two types of uterine contractions that occur. These are uterine contractions during the menstrual cycle and uterine contraction during childbirth or labor.