The human nose contains a postage stamp-size smelling organ, called the olfactory epithelium, at the roof of the nasal cavity.

人类鼻腔的屋顶，有一块面积如邮票大小被称之为“嗅上皮”的嗅觉器官。

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Objective:To Provide morphological data of olfactory nerves, bulb and tract of Chinese to protect olfactory function in the operation of nasal cavity roof and anterior cranial fossae.

目的：填补国人嗅神经、嗅球和嗅束的形态学资料，为鼻腔顶、颅前窝手术提供保护病人嗅觉功能的解剖学依据。

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"When we chew and swallow, volatile molecules from the food go through the rear of the nasal cavity to the olfactory receptors in the roof of the nose, " says Richard Doty, director of the University of Pennsylvania's Smell and Taste Center.

WSJ: How to Sharpen Your Sense of Smell

My 13 yr old golden, Lacie, was diagnosed with a fast growing fibrosarcoma tumor in her mouth that was so advanced it had already grown into her nasal cavity and was an extremely large mass located in the roof of her mouth.

FORBES: When A Pet Has Cancer Part II