let's share knowledge about reproductive biology

Thursday, May 19, 2011

male reproductive organ

Male reproductive organs consist of several organs of the penis, scrotum, testis, vas deferens, epididymis, seminal vesicles and prostate gland. Among this organ is located in the body so we can not see.
When a son was born, he has reproductive organs is complete. However, the reproductive organs had not been able to produce offspring until it was past puberty.
PenisKarena shame, people often call this one organ with various terms that are not appropriate. But from now on, we must accustom ourselves to utter the word with the fair.
The penis can be divided into two parts, ie stem-largest part of the penis, and head. At the head of the penis there is skin covering it. This skin is removed when someone does a circumcision (circumcision).
On the inside of the penis there is a spongy tissue that can swell and stiffen. When a man's sexual desire increases, or sometimes for no reason yag clear, this network will fill with blood and consequently the penis enlarges and hardens. This is called an erection. Ability to erect a big role in reproductive function.
On the inside of the penis there is also a channel that serves to remove the urine. It also serves to drain the sperm out.

The scrotum is a sac of skin that hangs below the penis. His job is to support and protect the testes. Due to hang outside the body, scrotum testes also make the temperature lower than body temperature. This condition is advantageous because the testes to make sperm in the best condition.
In performing its functions, the scrotum can even change the size. When the air temperature is cold, the scrotum will shrink and cause the testes closer to the body and thus warmer. In contrast to the hot weather, the scrotum will swell and loose. As a result the scrotum increased surface area and heat can be issued.

Testis is a small organ about 5 inches in diameter in adults. He is located outside the body and are protected by the scrotum. Position outside the body makes the testes are in the cooler (? 34? C) and optimum for sperm production.
As she passed puberty, a special channel-shaped coil in the testes start to make sperm cells. Since at this point, the testes will start his job in making sperm. Special assignment will continue until the owner dies diembannya.
Want to know the number of sperm are made? Hundreds of millions per day. The amounts outstanding.
Testes also have other responsibilities. He must make the hormone testosterone. This hormone is a hormone that is responsible for the changes you become an adult. Make your voice be large and heavy, and various other changes which show that a child is growing up.

The epididymis is a long coil-shaped channel is perched above and behind the testicles. Epididymis will deliver sperm (produced by the testes) to the outside. The journey is long enough to go by the sperm. Approximately 4-6 weeks of travel in the epididymis.

Vas deferens
The vas deferens is a tube formed from muscle. The vas deferens extends from the epididymis to the urethra. Vas deferens sperm serves as a storage area prior to release through the penis.
SeminalisVesikula seminal vesicles was commissioned to create fluid mixes with sperm to produce semen (the fluid released by a male during ejaculation).

The prostate is a gland that served to create a fluid, which together with the liquid produced by the seminal vesicles, where the sperm will swim.

female reproductive organs
Female reproductive organs can be divided into external genital organs and genital organs inside.
Outside the reproductive organs consist of:
1. The vagina is a tube that connects the uterus with organs outside the body. Functioning as an organ of copulation and birth canal so it is often called the baby out with the vagina. Found inside the vagina hymen.
2. Vulva is a gap located on the outside and divided into 2 parts:
Labium major is a big pair of lips located on the wide and limit the vulva.
Labium minor is a small pair of lips located on the inside and limit the vulva

Reproductive organs consist of:

1. The ovary is the main organ in women. Number pair and is located in the abdominal cavity at the waist area to the left and right. Serves to produce ovum and female hormones such as:
Estrogen serves to maintain the secondary nature of women, and also help in prosers ovum maturation.
Progesterone that functions in maintaining pregnancy.
2. Fimbriae is a fiber / soft cilia located at the base of the ovary adjacent to the end of the oviduct canal. Serves to capture a mature ovum released by the ovaries.
3. Infundibulum is the funnel-shaped oviduct tip / enlarged and adjacent to the fimbriae. Functioning accommodate ovum that has been captured by the fimbriae.
4. The fallopian tubes are elongated channel after the infundibulum which served as the site of fertilization and the way for the ovum to the uterus with the aid of cilia on the walls.
5. Oviduct is a long line continuation of the fallopian tubes. Function as the site of fertilization and the way for ovum towards the uterus with the aid of cilia on the walls.
6. The uterus is a hollow, muscular organ. Shaped like a pear with a smaller bottom. Functioning as a place of embryo growth. Type the uterus in humans is a simplex with one room for only one fetus. The uterus has 3 kinds of wall layers, namely:
Perimetrium the outer lapisanyang that serves as a protector of the uterus.
Myometrial layer that is rich in muscle cells and serves to contraction and relaxation of the uterus with dilated and returned to their original form every month.
The endometrium is the innermost layer that is rich in red blood cells. If it does not happen pembuahanmaka endometrial wall is what will decay along with the mature ovum.
1. Cervix is part of the uterus that forms the basis of so-called well as narrowing of the cervix. Connects the uterus with the vaginal canal and as a way out of the fetus from the uterus into the vaginal canal.
2. Vaginal canal is a continuation of the cervical canal and through the vagina.
3. The clitoris is a small protrusion located in front of the vulva. Often referred to klentit.

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