Illustration of testosterone molecules in the blood. Testosterone is the main human male sex hormone (androgen) and is responsible for the development of the male reproductive organs and secondary sexual characteristics. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / NEMES LASZLO |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |