Mammalian embryo is directly surrounded by
Amniotic cavity
Allantoic cavity
Primary digestive cavity
Yolk sac cavity
In teleosts, reptiles and birds the cleavage pattern is
The rolling of endodermal and mesodermal cells from the surface of embryo into its interior is called
Vestibular glands secrete
The main function of tropho ectoderm in mammalian embryo is
The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is for