(a) Name the organ that produces sperms as well as secretes a hormone in human males. Name the hormone it secretes and write its functions.
(b) Name the parts of the human female reproductive system where fertilization occurs.
(c) Explain how the developing embryo gets nourishment inside the mother's body.

Explanation

(a) This organ is testes. The hormone secreted by testis is Testosterone. This hormone controls the changes which occur in human males during puberty. It leads to formation of sperms and development of secondary sexual characters.
(b) This part is Fallopian tube.
(c) Developing embryo gets the nourishment inside the mother's body from Placenta which is developed on the wall of the uterus of the mother. It provides a large surface area for glucose and oxygen to pass from the mother's blood to the developing embryo.