MEDI113 Lecture Notes - Lecture 3: Airway Resistance, Thoracic Wall, Obstructive Lung Disease
23 Aug 2018
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Document Summary
Functions and structure: organs, respiratory zones. Lung volumes and capacities: blood flow to the lung, o2 and co2 transport in blood, o2 transport in muscle. Response during exercise: control of ventilation during exercise. Pulmonary respiration: ventilation, exchange of o2 and co2 in the lungs. Cellular respiration: o2 utilisation and co2 production by the tissues. Purposes of the respiratory system during exercise: gas exchange between the environment and the body, regulation of acid-base balance during exercise. Means of gas exchange between the external environment and the body: replacing o2, removing co2, regulation of acid-base balance. Ventilation: mechanical process of moving air into and out of lungs. Diffusion: random movement of molecules from an area of high concentration to an area of lower concentration. Organs: nose and nasal cavities, pharynx and larynx, trachea and bronchial tree, lungs, alveoli, site of gas exchange. Lungs are enclosed by membranes called pleura: visceral pleura, on outer surface of lung, parietal pleura, lines the thoracic wall.
