Why the testes in human beings and mammals are situated outside the abdominal cavity within a pouch called scrotum?
There is not enough space in the pelvic area for the testicles to be housed internally
The scrotum helps in maintaining the low temperature of testes, $2.5°C$ lower than normal body temperature required for spermatogenesis
The scrotum helps in maintaining the high temperature of testis, $2.5°C$ higher than the normal body temperature required for spermatogenesis
Providing more space for the growth of epididymis
The hormone that prepares and maintains the uterus during pregnancy is secreted by
In man sperms move after ejaculation at a rate of nearly
Cryptorchidism is the condition in man when
The first sign of the growing foetus may be noticed by listening to the heart sound carefully through the stethoscope. Embryo's heart is formed _________.
Animal $\quad$ Gestation period
The uteri and vagina lie in a fold of peritoneum called