54. How are sperms formed?
Sperm is the male reproductive cell. It unites with the female cell, the
ovum to achieve fertilization. The sperm looks like a tadpole. It has
four different parts: head, neck, middle piece, tail.
The head contains the nucleus, neck bears centriole, middle part
contains mitochondria and the tail provides locomotion to the sperm
as a whole. It is sperm which carries the genetic message that
determines the sex of the child.
The scrotal sac has 30C less temperature than the body temperature
which help the production of sperms in the testis. The sperms are
contained in a fluid called semen. There may be 100 million sperms
in one ml of the semen.
After puberty, a male starts to produce sperms. A healthy person
produces approximately 10 to 30 billion sperms in a month. If the
sperms have been ejaculated into the vagina of a woman, they move
fast and reach the fallopian tube where one of them fuses with the
egg to bring about fertilization.
