(a) Testes produce sperms and secrete a hormone called testosterone.
The function of testosterone is to control the development of male sex organs and secondary sexual features.
(b) (i) Oviduct or fallopian tubes (ii) Uterus
After implantation, a disc-like special tissue called placenta develops between the uterus wall and the embryo which helps in the exchange of nutrients, oxygen and waste products between the embryo and the mother.