Testosterone molecule,artwork. Testosterone is a steroid hormone responsible for the development of male secondary sex characteristics,and is the principle male sex hormone produced in the testes | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Animate4.com |
Taille de l’image : | 4205 px × 4205 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |