Sperm cell

By: Jorge ramos, Rodrigo Rosas and Yael Lama

• sperms are produced in the male reproductive organs, called testes.

•The testes consist of a mass of sperm producing tubes that are join together , leading to the epididymis.

•The lining of the sperm production tubules in the testis consists of rapidly dividing cells, after a series of divisions, the cells grow a long tails and became sperms

Sperm cells

Sperm cellThis means the entire sperm cycle requires approximately

100 days

Old sperm cells die off and new cells are created at a rate of about one percent each

day.

Sperm cells were first

observed by Anton van

Leeuwenhoek in 1677

Spermatozoa are produced in the seminiferous

tubules of the testes in a

process called spermatogenesi

sThe term "sperm"

probably comes from sperma which in Greek

is "seed" or Latin "something sown".

The human sperm cell is

the reproductive cell in males and will only

survive in warm

environments,

Parts of the sperm cell

Sperm cells contribute approximately half of the nuclear genetic information to the diploid offspring.

The capsule also has a unique surface feature in its membrane which allows it to burrow through the shell of the woman's egg

Using the enzymes that are built into its surface, the sperm cell digests its way through the outer eggshell called the zona pellucida.

The sperm cell is then able to enter into the main part of the egg, the ooplasm, achieving successful fertilization.

Function of a sperm cell

http://en.wikipedia.org/wiki/Spermatozoon#Spermatozoa_production_in_mammals

sources

http://wiki.answers.com/Q/Sperm_cell_functions

http://www.essortment.com/sperm-cell-spermatozoa-61515.html