Why sperm know ' pool '?

The sperm is made by the State to small cells called homunculi or animalcules. Each sperm cells consists of three basic parts: the first part (which contains hereditary DNA), the middle part (the power supply for the tail), and the tail itself (also known as roi).

The sperm move like?

There are about 20-100 million sperm per ml of semen is released each time the man ejaculate. Healthy man will manufacture from 1.5 ml to 5 ml of semen per ejaculation.

The sperm cells swim approximately 5 mm per second. This speed may sound slow, but didn't actually small compared with the size of the sperm. If a whale has the ability to move quickly as the sperm, which can swim at a speed 24140 km an hour.

Sperm tail has a long, thin fibers, able to swim to the side. Thus, we can move forward. During intercourse, so irritated by these sexual acts, the uterus contracts to form a negative-pressure sperm into the uterus, ovary help shorten travel time of sperm.

Scientists believe that the sperm cells to the egg in two complex mechanisms, including the ability to swim toward a higher concentration of the molecules are created by the egg (also known as chemotaxis mechanism) and the ability to navigate to areas of high temperature during a woman's reproductive glands to look to the uterus (also known as the mechanism of thermotaxis).

With no sperm cells are ejaculated, they will be returned to the man's body.

The sperm survive?

That depends on the environment they exist in. If the inside parts of the woman's fertility, sperm can survive within five days. If in addition to the environment, they can only survive a few hours at most.=