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.. EL APARATO REPRODUCTOR MASCULINO..
El aparato reproductor masculino se encarga de producir los gametos (espermatozoides) y transportarlos al interior del aparato reproductor femenino. Además actúa como glándula endocrina, produciendo testosterona .

· Testículos: producen los espermatozoides y segregan testosterona .
· Epididymis : folded tube in which sperm are stored.
deferens Supported Devices: by them carries sperm to the urethra.
· seminal vesicles: produce nutrients that make up the semen.
· Prostate secrete the seminal fluid that mixes with sperm to form semen.
· Urethra duct of the semen and urine.
· Penis erectile organ which deposits sperm inside the vagina.


FEMALE REPRODUCTIVE .. ..
The apparatus female player is responsible for producing female gametes (eggs) and host the embryo during development. also acts as an endocrine gland, producing estrogen and progesterone .

· Ovaries: are responsible for playing the eggs and secrete estrogen and progesterone .
· Fallopian tubes: are two tubes that collect the egg from the ovary and the egg leads him and lead him to the uterus.
· Uterus: is a hollow organ, in which is located inside the uterine cavity. Communicates with vagina by a narrow passage called the cervix. It accommodates and nourishes the embryo.
· Vagina: is a flexible conduit communicating with the outside. It deposited the sperm.
· Vulva: are the external genitalia. They consist of two folds of skin called the labia majora and labia minora.


gamete formation .. ..
Sperm are male gametes. Specialized cells are formed by a head, which contains the nucleus, and a tail that lets you scroll.

1. In the seminiferous tubules sperm cells are formed from stem cells.
2. The sperm travel up epididymis, where they are stored.
3. The seminal vesicles and prostate gland produce nutritious substances discharged into the vas deferens.
4. At the time of his departure abroad, the sperm travel the vas deferens, bind with the nutrients and form the semen, which comes out through the urethra.


.. .. EGG FORMATION
The egg is the female gamete and is produced cyclically in the ovary. Every 28 days
about an egg is released from the ovary into the fallopian tube (ovulation). This process is called ovarian cycle begins at puberty and women. Normally only one egg in each cycle.


* Inside the ovary are called cavities follicles, each of which contain an immature egg.
* Periodically, a follicle undergoes a process of growth and maturation that takes about 14 days. This stage is known as the follicular phase.
* When the follicle is mature opens and releases the egg it contains.
is ovulation, which occurs around day 14 of cycle.
* The rest of the follicle degenerates into a structure called the corpus luteum or corpus luteum, until it finally disappears. This is the phase of corpus luteum.


.. FERTILIZATION OF BIRTH ..
During intercourse, sperm are deposited in the vagina and ascend the female genital tract to the fallopian tubes.

* After intercourse, millions of sperm up towards the fallopian tubes .
* On reaching the egg, only one sperm to fuse with the egg, forming a single cell called a zygote.
* Eight days after fertilization, the embryo reaches the uterus, where it enters the uterine lining is installed in the nesting . From the moment pregnancy begins.


PREGNANCY .. ..
The gestation or pregnancy is a period that lasts about nine months nesting begins and ends with delivery. It causes the formation of all organs of the new human being.
The mother and the embryo is attached to the placenta through the umbilical cord.
From the fourth month, the embryo has its own characteristics of human beings and is called fetus. During the last weeks of pregnancy the fetus is covered by the amniotic sac containing a liquid that protects and helps in their development.


DELIVERY .. ..
At the end of gestation, the fetus puts his head on the cervix and labor begins. During labor there are three stages: dilation, expulsion and delivery.