HKR 2311 Lecture 7: HKR2311 - Unit 7
14 Feb 2017
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Document Summary
Respiratory system: there are five primary functions of the respiratory system: Gas exchange of oxygen and carbon dioxide. Movement of air to and from the lungs. Protection and maintenance of the respiratory pathways. Providing olfactory sensations to the central nervous system (cns) Ventilation is the result of both inspiration and expiration. The respiratory tract: the nose and nasal cavity. The nose and nasal cavity is composed of nasal bones, cartilage, and external nares. The nasal septum divides the nasal cavity into right and left sides. It is formed by the fusion of the vomer and the perpendicular plate of the ethmoid bone. The nasal cavity is formed by the fusion of the ethmoid, maxillary, and inferior conchae. Air flows between adjacent conchae through the superior, middle, and inferior meatuses. The meatuses are small grooves that act to filer the incoming air by creating a turbulent flow, which causes foreign particles to become trapped in the surrounding mucus.
