uterus

Construction of the uterus

The womb or uterus is a female sexual organ which has the shape and the size of a pear. It is located in the pelvic cavity, behind the bladder and the rectum. 

 The uterus is formed of two parts: 

the body and the cervix. The body is connected via the fallopian tubes with the ovaries. In the body can also be the implantation of a fertilized egg (embryo) will take place. The cervix is ​​the connection with the cervix as a connection to the vagina.

The uterine wall consists of four layers. The outer layer consists mainly of smooth muscle which contracts strongly during childbirth to expel the baby. This is called labor. Next comes another layer with a lot of muscle .

 The third layer 

consists of ring-shaped muscle tissue. This baby leans during pregnancy. The innermost layer is the uterine lining (endometrium). This lining is made from two layers:1( the basal layer and 2)the functional layer.the no. 2 disposed at menstruation and then grows during the cycle and The basal layer is always present  . In this layer the fertilized ovum implants itself.

Uterus

Function of the uterus

The uterus has several functions. Below, the most important will be discussed:

Embryo implantation

The main function of the uterus is the implantation of the fertilized ovum. Each month, there will be in one of the ovaries a mature egg is released. This comes in the fallopian tube (ovulation). After intercourse, the egg can be fertilized by a sperm there. After this move the fertilized cell to the uterus, where it can implant in the uterine lining. Here the embryo extract sufficient nutrients for growth and development until the placenta (placenta) is formed.

Embryo protection

Even if you're pregnant, the uterus plays an important role. About two weeks after the implantation of the embryo amniotic fluid begins to develop herein. This serves as a buffer for the embryo, where it can move freely and is safe from bumps, 

pushes and temperature changes. Also carries waste from the embryo and protects it against infections. 

Delivery

Labor begins when the uterus to contract. These contractions you call labor and ensure that the cervix softens and 

unlocks. Childbirth can also begin to rupture of membranes.

Embryo implantation

The endometrium responds strongly to the female sex hormones estrogen and progesterone. They prepare the endometrium for a 

possible pregnancy. Estrogen ensures that the endometrium becomes thicker, and by progesterone arise more mucus glands. If 

fertilization does not occur, the corpus luteum dies. As a result, the amount of sex hormones and the endometrium 

partially divested. These blood vessels burst and bleeding occurs (menstruation).

Embryo protection

Mother and child care both for the development of amniotic fluid. The placenta, which arises from special cells of the 

embryo, to replace just before delivery every half hour for nearly half a liter of amniotic fluid. Approximately 98% of 

the amniotic fluid consists of water. The rest consists of urine and skin cells from the baby, placenta nutrients and 

hormones.