How sperm is form and in our body how many are their
Answers
Answer:
Sperm production
Spermatogenesis is the proccess by which male spermatogonia (immature germ cells) present in the inner walls of the seminiferous tubules of testes develops into the mature sperms.
Spermatogonia increase in number by mitosis. These are diploid.
Some of the spermatogonia called primary spermatocytes periodically undergo meiosis.
After the first meiotic division, two haploid and equal secondary spermatocytes are formed.
They further undergo meiosis to give rise to four haploid spermatids.
These spermatids are converted into sperms by spermiogenesis.
They are in millions.
Its around 40 million to 300 million of sperms.
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Explanation:
SPERM
Sperm is the male gamete (reproductive cell), devel-
oped in the testis. It is also called spermatozoon (plural
= spermatozoa). Matured sperm is 60 p long.
Sperm Count
Total count of sperm is about 100 to 50 millions/mL of
semen. Sterility occurs when the sperm count falls
below 20 millions/mL.
Survival Time
Though the sperms can be stored in male genital tract
for longer periods, after ejaculation the survival time is
only about 24 to 48 hours at a temperature equivalent
to body temperature.