Study the figure given below and answer the questions that follow:
Mention the fate of the inner cell mass after implantation in the uterus.

Give reasons for the following:

1. The human testes are located outside the abdominal cavity.
2. Some organisms like honey-bees are called parthenogenetic animals.

Where are fimbriae present in a human female reproductive system? Give their function.

Mention the relationship between concentration of luteinising hormone and maintenance of endometrium in the human uterus.

List the three hormones produced in women only during pregnancy. What happens to the levels of estrogen and progesterone during pregnancy?

After implantation interdigitation of maternal and foetal tissues takes place. Identify the tissues involved and justify their role.

Give reasons why the human testes are located outside the abdominal cavity.

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

Differentiate between morula and blastula.

Where is acrosome present in humans? Write its function.