In early haemopoietic tissue of embryo, there is
Chorion
Amnion
Allantois
Yolk sac
(d)The yolk sac is nonfunctional in human beings except that it functions as the site of early blood cell formation.
Egg which contains very little amount of yolk are called as
$A$ : The male urethra is longer than the female urethra. $R$ : It carries both urine as well as semen.
Which of these is used to control human population?
In the first phase of gastrulation of amphibians there occurs the separation of
During early and middle fetal life, the testis are located in the
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