The thickness of the vitelline membrane is about:

In mammals,ovulation is primarily under the influence of which hormones?

Identify $A, B, C, D$ and $E$ in the given figure of a human sperm.

During the process of spermiogenesis,the heads of the sperm become embedded in which of the following cells?

Ovulation occurs:

Give the names and functions of the hormones involved in the process of spermatogenesis. Write the names of the endocrine glands from where they are released.