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pit organ

anatomy
Also known as: loreal pit

Quick Summary

The pit organ is a specialized heat-sensitive receptor found in certain reptiles, most notably pit vipers. Located on the head, typically between the eye and nostril, these organs allow snakes to detect infrared radiation, essentially "seeing" heat images of warm-blooded prey. This ability is crucial for accurately aiming their strikes, especially in low-light conditions.12345

While pit vipers have distinct facial pits, other snakes like boas and pythons possess analogous structures called labial pits along their lips. These organs are highly sensitive to temperature changes, enabling these reptiles to locate and strike their prey with remarkable precision.423

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