The function of amniotic cavity is
Respiraiton
Protection from desiccation and shocks
Protection from desiccation
Protection from shocks
Placenta secretes
Which is not the function of placenta ?
In rabbit, the uterus is
$A$ : In frog gray cresent is formed during fertilization.
$R$ : It is because the black granules move towards the point of entry of the sperm in animal half
Blood flowing in umbilical cord is