A parietal eye (third eye, pineal eye) is a part of the epithalamus in some vertebrates. The eye is at the top of the head, is photoreceptive, and is associated with the pineal gland, which regulates circadian rhythmicity and hormone production for thermoregulation.
A parietal eye (third eye, pineal eye) is a part of the epithalamus in some vertebrates. The eye is at the top of the head, is photoreceptive, and is associated with the pineal gland, which regulates circadian rhythmicity and hormone production for thermoregulation.
Source: Wikipedia "Parietal eye" · CC BY-SA 4.0
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