The ability to reproduce is one of the properties which distinguish living from non- living matter, the process is one of sexual reproduction in which the male and female organs differ anatomically and physiologically. The difference between male and female are due to the difference between the reproductive organ, testes and ovaries, which produce the reproductive cells, spermatozoa and ova respectively. These reproductive organs produce numerous minute spermatozoa to store them and to transfer them to the reproductive messages of the smaller number of eggs and to provide the young with a suitable place to grow and with nourishment during the early part of its life.
In man, as in all the higher animals, the function of reproduction is connected with special apparatus. The reproductive organs of male and female are customarily divided into internal and external genitalia. For descriptive purpose, the reproductive system is divided into main two parts, they are: Male reproductive system and Female reproductive system.
The functions of the male reproductive organs are given below:
For the formation of sperm requires lower temperature (10 lower) than the human body temperature. So during embryo development testes descends down for further development. If testes fails to descend then the male person develops characters similar to female.