Female Reproductive System

Ovariums with female gonads are located below the abdominal cavity and are clasped by wide ligaments. As in the testicles, ovaries have two main functions: producing gametes (this time egg cells) and secreting the sex hormone. A large number of primary egg cells or oocytes (egg cells) are already present in the ovaries of a girl at birth. Their estimated number is between 100,000 and 1,000,000. In a 30-year reproductive period, a woman lays an average of 13 times a year to produce a mature ovum each time. Thus, only about 400 oocytes mature and leave the ovaries. The rest is degenerated and there are no oocytes in the ovaries of a 50-year-old woman.

Each oocyte is contained in a cellular package called follicle. Most immature small follicles fill the oocyte. During the maturation process, the follicle grows more than the oocyte and creates a large space filled with liquid. The oocyte is embedded in an epithelial cell mass that is elongated into this space. A mature follicle protrudes on the surface of the ovary; When ovulation occurs, the outer wall is ruptured and both the liquid and the oocyte are expelled. Normally, only one oocyte is left in each ovulation. There is no order in which the ovary will ovulate over a period.
In ovulation, the oocyte is released from the ovary into the abdominal cavity. It is usually taken from the large, funnel-like end of one of the oviducts (fallopian tubes). The oviducts partially overlap the ovaries, but are not a continuation of them. Cylinders in the oviduct funnel create currents that help the oocyte enter the oviduct. If the oocyte encounters sperm when the oviduct is in the upper third of the oviduct, then the passage of a sperm through the membrane of the oocyte stimulates its maturation in an actual egg cell (ovum), andThe nuclei of the ovum fuse for fertilization. Sometimes, a method of birth control used to permanently sterilize women is to connect a tube (ligation). In this operation, the oviducts are cut and ligated. Thus, the sperm cannot reach the oocyte and the ovum proceeds through the oviduct and is prevented from reaching the uterus. Like vasectomy in men, tube bonding does not cause any change in hormone production.
Each oviduct opens directly to the upper end of the uterus. This approximately fist-sized organ is located just behind the urinary incision in the lower abdominal cavity. It has an inner surface of mucus with very thick muscular walls and a large number of blood vessels. If an egg is fertilized as it moves through the oviduct, it is embedded in the wall of the uterus and the embryo continues its development until birth. Another method of birth control is to place a plastic ring or spiral in the uterus. These intrauterine devices are very effective in preventing pregnancy and possibly prevent attachment to the uterus. However, these devices sometimes cause irritation and / or bleeding to the uterus. So some women can't tolerate them. In addition, their reliability is questionable for long-term use. At the lower end, The uterus joins a vaginal tube, the vagina, which opens out. The vagina is the organ that accepts the male penis during the copulation. Very flexible walls allow the baby to pass through during birth. Uterus and vagina are not located on a line. Instead, the uterus almost went forward at an angle perpendicular to the vagina. The cervix with a muscular tissue ring in the mouth of the uterus extends into the vagina. Devices that block the uterus by covering the cervix are commonly used in birth control. of them The cervix with a muscular tissue ring in the mouth of the uterus extends into the vagina. Devices that block the uterus by covering the cervix are commonly used in birth control. of them The cervix with a muscular tissue ring in the mouth of the uterus extends into the vagina. Devices that block the uterus by covering the cervix are commonly used in birth control. of themThe diaphragm, which is one of them, is a rubber pouch that is not too deep and has a flexible spring on the edge. It is adjusted so that it is placed in the vagina and covers the entire cervix area. It is especially effective in preventing sperm entry into the uterus. The condom, which is another common contraceptive device, functions by keeping sperms away from the vagina.
The entrance of the vagina in young girls is partially closed by a thin membrane called hymen. Traditionally, the hymen is considered to be a symbol of virginity and is expected to tear in the first sexual union. However, this membrane is often seen as a result of diseases, a fall or excessive physical exercise in childhood.
Female external organs are collectively called vulva. The Vulva region is surrounded by two skin folds. These structures, called labia minor and labia major, surround a cavity called vestibul. The vagina opens to the back of the yestibula and the urethra to the middle. It should be noted that there is no connection between the excretory and reproductive systems in adult female mammals and the urethra is only to overflow the discharge agents. During embryonic development, the vagina and urethra share a common patency; but as the development progresses, this opening is divided so that the vagina and the urethra have separate openings.
In front of the vestibul there is a small organ, the clitoris, which may be in front of the place of the urethra. This organ consists of the same embryonic tissue in which the penis originates. Like a penis, this expands during sexual stimulation, and it is the most stimulated region in the course of copulation.
Source: poxox blogs


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