Respiratory System
Respiratory System

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nose - nostrils = n ares [nares ( pl. )( Latin ), naris ( sing. )] and nasal vestibules - separated by columella, anterior part of midline nasal septum - stratified squamous epithelium, hairs and sebaceous glands - nasal passages [nasal choanae ( pl. ), choana ( sing. )] - respiratory epithelium (respiratory mucosa) - pseudostratified ciliated columnar epithelium - epithelium includes ciliated cells, and goblet cells for mucus producti on - olfactory epithelium located in apices of nasal passages ( see next page ) - nasal septum - nasal cartilages anteriorly, nasal bones posteriorly - bony septum - perpendicular plat e of the ethmoid bone (superiorly) - vomer (inferiorly) - base of vomer attached anteriorly to midline along the suture line of palatal shelves (palatine processes) of maxillary bones, and posteriorly along the suture line of horizontal plates of palatine bones - lateral wall - conchae [(concha ( sing. )] = turbinate bones = three downward projections of bone, one above the other, covered by respirat ory mucosa - meatus = passageway space below each concha (turbinate) - frontal and maxillary sinuses open next to each other in the semilunar hiatus in middle meatus under m iddle concha - lacrimal duct opens in inferior meatus under inferior concha ©