Health Sciences 3300A/B Midterm: Respiratory System
10 Mar 2017
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Document Summary
External respiration (what the respiratory system is for: ventilation (pulmonary breathing, gas exchange: during ventilation. Structural: upper: nose, pharynx, lower: larynx, trachea, bronchioles, lungs. Glottis (vocal cords) is borderline of upper and lower. Functional: conducting (macroscopic structures): getting clean air to the lungs, humidi ed (added water vapour), warm. Terminal bronchioles: respiratory (microscopic): exchange co2 to o2. Nose (beginning of functional relationship: conducting: only external part, provides airway for respiratory system, moistens and warms air, lters air. Hairs in the nose trap the large particles = vibrissae. Respiratory mucosa throughout nasal cavity: resonation chamber for speech, olfactory receptors for olfactory nerve (cn i) Nasal cavity: starts at nostril (external nairs); ends (exits) at choana (internal nairs) (opens into nasal pharynx) Tuesday, february 7, 2017: divided in midline by nasal septum, vibrissae trap large particles (large hairs start ltration of debris, mucous linings. Olfactory mucosa (dedicated to sense of smell) *nothing to do with respiratory system.
