HSCI 100 Lecture Notes - Lecture 13: Thoracic Cavity, Nasal Cavity, Capillary
17 Mar 2016
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Document Summary
External respiration- exchange of o2 & co2 b/w lungs & blood. Gas transport- moving o2 & co2 b/w lungs & tissues. Internal respiration- exchange of co2 & o2 b/w blood & tissues. Inhalation: nose/mouth trachea bronchus bronchiole alveolus in lung blood capillary. Exhalation: blood capillary alveolus in lung bronchiole bronchus trachea nose/mouth. Upper respiratory system ilters, warms, moistens air. Sinuses- cavities in skull, lighten head, war/moisten air. Nasal cavity- produces mucus, ilters/warms/moistens air, olfaction. Larynx- air passageway, prevents food from entering lower respiratory system, produces voice. Lungs- structures that contain alveoli & air passageways; allows exchange of. Trachea- connects larynx w/ bronchi, conducts air to & from bronchi. Bronchi- 2 branches of trachea that conduct air from trachea to lungs. Bronchioles- narrow passageways to conduct air from bronchi to alveoli. Diaphragm- muscle sheet b/w chest & abdominal cavities. Made of connective tissue, smooth muscle & c-shaped cartilaginous rings.
