Identify $X$ from figure :
Cavity of uterus
Placental villi
Yolk sac
Umbillical cord with its vessels
Except endocrine function, what are the other functions of placenta.
Assertion : During fertilization only head of spermatozoa enters egg.
Reason : If several spermatozoa hit the egg at same time, all can enter the egg.
Relaxin hormone is produced from
Which one of the following is not the function of placenta?
The extra structure that provides nutrition to the embryo is