The testes (two male reproductive organs).
• Where it exists: It is found in males only.
• Function: Produces the production of testosterone.
* Testosterone function:
1) Controlling male sexual characteristics.
2) sperm production.
• Where it exists: It is found in males only.
• Function: Produces the production of testosterone.
* Testosterone function:
1) Controlling male sexual characteristics.
2) sperm production.