GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Fingers forming O. Coloured X-ray of a hand in side view, with the thumb and forefinger forming a circle or "O" shape. This hand signal can mean "yes" or "OK". A thumb which opposes the other fingers is found only in primates and in humans it gives the hand precise and delicate movement. Bones of the fingers, wrist and forearm are seen.
Model release not required. Property release not required.