Illustration of the four parathyroid glands (red), which are situated behind the thyroid gland. The parathyroid glands produce parathyroid hormone, which regulates the amount of calcium in the blood and within the bones. | |
Licence : | Libre de droits |
Crédit: | Science Photo Library / Kon, Kateryna |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |