GENERAL HISTOLOGY

Detailed explanation-1: -If fertilization does not occur, the endometrium, coupled with blood and mucus from the vagina and cervix (the lower, narrow part of the uterus located between the bladder and the rectum) make up the menstrual flow (also called menses) that leaves the body through the vagina.

Detailed explanation-2: -If there is no sperm to fertilize an egg, then the egg will be unfertilized. An unfertilized egg will not implant in the thickened uterine lining. In this case, the thickened uterine lining will be shed as menstrual blood in a process called menstruation or a period.

Detailed explanation-3: -Unless the egg is fertilized by a sperm while in the fallopian tube, the egg leaves the body about 2 weeks later through the uterus-this is menstruation. Blood and tissues from the inner lining of the uterus combine to form the menstrual flow, which in most girls lasts from 3 to 5 days.

Detailed explanation-4: -The uterus has a muscular outer layer called the myometrium and an inner lining called the endometrium.

Detailed explanation-5: -The lining of the uterus (endometrium) starts to thicken. One of the ovaries releases an egg. And then, if the egg isn’t fertilized or a fertilized egg doesn’t attach to the lining of the uterus (implant), the endometrium sheds from the uterus as a menstrual period.