Write two major functions each of testis and ovary.

Explanation

Functions of the Testis
`implies` They produce male gametes called spermatozoa by the process of spermatogenesis.
`implies` The leydig cells of the seminiferous tubules secrete the male sex hormone called testosterone. Testosterone aids the development of secondary sex characteristics in males.
Functions of the ovary
`implies`They produce female gametes called ova by the process of oogenesis. `implies` The growing Graffian follicles secrete the female sex hormone called estrogen. Estrogen aids the development of secondary sex characteristics in females.