PET 3322L Lecture Notes - Lecture 5: Cartilage, Internal Thoracic Artery, Chronic Obstructive Pulmonary Disease
9 Dec 2017
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Document Summary
Respiratory system functions: respiration, ventilation, movement of air into and out of lungs, external respiration, gas exchange between air in lungs and blood, transport, oxygen and carbon dioxide in the blood. The respiratory system: split into two functional categories, conducting zone, nose and nasal cavity, pharynx, larynx, trachea, to the terminal bronchioles, respiratoy zone, respiratory bronchioles, alveolar ducts, alveolar sacs. Nose and nasal cavities functions: passageway for air, cleans air, humidifies and warms air, olfaction, voice sound. Pharynx: common opening for digestive and respiratory systems, three regions, nasopharynx, oropharynx, laryngopharynx. Tracheobronchial tree: trachea to terminal bronchioles which is ciliated for removal of debris, cartilage decreases and smooth muscle decreases along the tracheobronchial tree. Respiratory zone: respiratoy bronchioles to alveoli: respiratory zone: site for gas exchange, alveoli, small, air-filled chambers were gas exchange occurs, respiratory bronchioles, alveolar ducts, alveolar sacs. Lung pleura: pleural cavity surrounds each lung and is formed by the pleural membranes.
