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68.7 MB (2.4 MB compressed)
6000 x 4000 pixels
50.8 x 33.8 cm ⏐ 20.0 x 13.3 in (300dpi)
KATERYNA KON / SCIENCE PHOTO LIBRARY KATERYNA KON / SCIENCE PHOTO LIBRARY
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.
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