Illustration of a testosterone molecule 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: | - |