The whole thing! Labor is a series of contractions that cause the upper part of the uterus (fundus) to tighten and thicken which works to push the baby down and out - while the cervix and lower portion of the uterus stretch and relax, giving the baby a passage from inside the uterus and into the birth canal for delivery.
The uterine wall plays a crucial role in female reproductive health by providing a supportive environment for a fertilized egg to implant and develop during pregnancy. It consists of three layers: the endometrium (inner lining), which thickens for implantation and sheds during menstruation; the myometrium (muscular layer), which contracts during labor; and the perimetrium (outer layer), which protects the uterus. Additionally, the uterine wall facilitates the menstrual cycle and contributes to the overall reproductive process.
During menstration the stratum functionalis of the endometrium is shed
The endometrium.
The non-pregnant uterine wall primarily consists of three layers: the endometrium, myometrium, and perimetrium. The endometrium is the inner lining that undergoes cyclical changes during the menstrual cycle. The myometrium is the thick middle layer composed of smooth muscle, responsible for uterine contractions. The perimetrium is the outer layer that provides structural support.
i think is myocardium
Muscular layer
Uterine muscle cells help make up the myometrium, which is the inner layer of the uterine wall. These muscle cells aid in inducing uterine contractions. They support stromal and vascular tissue as well.
The lining of the uterine cavity is called the "endometrium". It consists of the functional endometrium and the basal endometrium. Shedding of the functional endometrial lining in humans is responsible for menstrual bleeding.
muscularis
The middle layer of the uterus is called the myometrium. It is composed of smooth muscle tissue that contracts and helps to push out the baby during labor. The myometrium is important for maintaining the shape and size of the uterus.
endomoetrium
Uterine myomas are also known as uterine fibroids. These fibroids grow from the smooth muscle layer of the uterus. This smooth muscle wall is known as the myometrium. The fibroids are most commonly benign (non-cancerous) tumors that are typically found during a woman's child-bearing years.