Write the location and functions of the following in human testes:
Leydig cells.

On the basis of the functions mentioned below, identify each one correctly.

1. It helps in the movement of spermatozoan in a fluid medium.
2. It contains hydrolytic enzymes and is used to contact and penetrate the egg during fertilisation.

Draw a diagrammatic sketch of the microscopic view of a mammalian sperm and label any four parts in it.

Name the hormones involved in regulation of spermatogenesis.

Where do sperms mature and become motile?

Even before birth of the baby, the mother shares a beautiful bond with the child. Explain the statement in scientific manner.

Draw a labelled diagram of sperm.

How is the milk production regulated by hormones in human female? Explain.

Identify A, B, C and D with reference to gametogenesis in humans in the flow chart given below:

What stimulates pituitary to release the hormone responsible for parturition? Name the hormone.