The embryo of man is protected by
Amniotic cavity
Peritoneal cavity
Pleural cavity
Allantois
In vertebrates the nails are formed from
Two major entities seen in human testis $\mathrm{TS}$ are
The events of the menstrual cycle are represented below. In which of the following option the level of $FSH$, $LH$ an progesterone is mentioned correctly
Mesoderm gives rise to all the structures except
Which of the following undergoes spermiogenesis?