Upload
bruce-brewer
View
34
Download
0
Embed Size (px)
DESCRIPTION
Sperm cell. By: Jorge ramos, Rodrigo Rosas and Yael Lama. Sperm cells. 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 . - PowerPoint PPT Presentation
Citation preview
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