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

Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces with the hormonal factor(s) responsible for the events shown.

A sperm has just fertilised a human egg in the fallopian tube. Trace the events that the fertilised egg will undergo up to the implantation of the blastocyst in the uterus.

First half of the menstrual cycle is called proliferative phase as well as follicular phase. Explain.

State the role of oxytocin in parturition. What triggers its release from the pituitary?

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.

List the different parts of the human oviduct through which the ovum travels till it meets the sperm for fertilisation.

Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

Write the location and functions of Myometrium and Endometrium.
OR
Explain the functions of myometrium and endometrium in human females.

Name the organs which comprise the male reproductive system.