颊窝毒蛇的毒牙是长的空心管子。
响尾蛇位于鼻子上的中空骨腔被称为颊窝器官，内含热敏感的极度薄膜，是与大脑相连的刺激感受器。
The diamondback rattler has hollow, bony cavities above the nose called pit organs containing ultra-thin, heat-sensing membranes that activate receptors connected to the brain.
虽然这个发现的一些方面与已知的行为学和生理学工作相悖，分子基因技术的应用是了解颊窝如何工作的进步。
Although aspects of the findings contradict known behavioural and physiological work, the use of molecular genetic techniques is a new step in understanding how the facial pits work.
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