BIOL 221 Lecture Notes - Lecture 7: Paranasal Sinuses, Olfactory Mucosa, Goblet Cell
3 Mar 2020
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Document Summary
Filters particles and pathogens out of air. Review your notes from lab regarding the structure and function of the nose and nasal cavity. As air passes through these passageways, air is warmed and humidified. Particles and pathogens can be trapped by the mucus secreted by goblet cells and filtered out of the air. These areas work with the paranasal sinuses to resonate sounds produced for speech. Olfactory receptors (a&p i) located in the olfactory mucosa are part of the nervous system that works with the respiratory system to accomplish smell. Axons of these neurons enter the cranium through olfactory foramina in the cribriform plate of the ethmoid bone. Stratified squamous (nasal vestibule) or pseudostratified columnar epithelium (nasal cavity) The external nares open into the nasal vestibule, which is lined with stratified squamous epithelium. Posterior to the vestibule is the nasal cavity, which is lined with pseudostratified columnar epithelium.
