50.6 MB (1.5 MB compressed)
4205 x 4205 pixels
35.6 x 35.6 cm ⏐ 14.0 x 14.0 in (300dpi)
ANIMATE4.COM / SCIENCE PHOTO LIBARY ANIMATE4.COM / SCIENCE PHOTO LIBARY
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.
Model release not required. Property release not required.