The elastic tissue connecting the cauda epididymis to the scrotal sac is

Relative sizes of an egg cell, morula, blastula and gastrula are

Function of allantois in mammal is

The extra-embryonic membranes of mammalian embryo are derived from

In a human foetus the limbs and digits develop by the end of

The stroma of the ovary consists of nerves, blood vessels, muscle fibres and a type of protein called