Anatomy and Cell Biology 3309 Lecture Notes - Lecture 17: Granule Cell, Neuroendocrinology, Trachea
23 Jan 2017
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Document Summary
The nasal cavities are paired chambers separated by a bony and cartilaginous septum. They are elongated spaces with a wide base that rest on the hard and soft palate and a narrow apex that points toward the anterior cranial fossa. The skeletal framework of the nasal cavities is formed by bones and cartilages; most are located centrally in the skull except for the small anterior region that is enclosed within the external nose. The nasal vestibule forms a part ofthe external nose and communicates anteriorly with the external environment. It is lined with stratified squamous epithelium, a continuation ofthe skin ofthe face, and contains a variable number of vibrissae that entrap large particulate matter before it is carried in the air stream to the rest of the cavity. Sebaceous glands are also present, and their secretions assist in the entrapment of particulate matter.
