Reproduction Flashcards
define reproduction
the process of formation of product from living entity is called reproduction.
occurs in all livings.
types of reproduction
i) Asexual
ii) Sexual
animals which deosn’t lay egg are called?
Viviparous
Ex: Humans,goat,buffalo
animals which lay egg are called
oviparous
EX:almost birds,snake
living having one sex in body
Unisexual
Human
male reproductive system is classified as
i)primary sex organs—-testes
ii)Secondary sex organs—-penis and accesory ducts.
male reproductive parts inside body are termed as and are?
Internal genetilia—–Testes,glands.
male repr.organs outside body
External genetilia—penis and scrotum
what is scrotum?
A pouch like body in which testes are present.It is present btw two thighs.
why testes in scrotum?
Before birth testes are in abdomen but as body temp is 37C and testes require 34/35C then it moved to scrotum which maintains temp of testes.
testes are formed of?
Each testis is formed of 250 lobules and each lobule is formed of 1-3 seminiferous tubules.
Where sperms are formed and by which cells?
In seminiferous tubule by spermatogenia.
define other cells of seminiferous tubule?
Sertoli cell–> provide nutrition and nurioshmnet to sperm cell, Make androgen binding factor and form inhibin.
Leydig cell—-> form testosterone/androgen
Define leydig cell?
it is also called interstitial cell because it is present at interstitial space between seminiferous tubules.
it produce testosterone outside seminitubule but sertoli bind oit to seminiferous tubule.
Define sertoli cell?
It is also called nurse cell because it serves sperm as nurse serves baby.
it also form inhibin to inhibit FSH. it makes antimullerin factor in male means undominant female baby producing factor.
