Physiology 2130 Study Guide - External Intercostal Muscles, Alveolar Pressure, Intercostal Muscle
11 Jun 2013
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Document Summary
Respiratory physiology responsible for transport of oxygen in the air to the blood and removal of co2 from blood to air. 7 functions: provides o2, removes co2, regulates blood ph, speech, microbial defense, chemical messenger concentrations, traps and dissolves small blood clots. Lung anatomy- thoracic cavity: lungs suspended in thoracic cavity and surrounded by chest wall. Space between lungs and chest wall is called intrapleural space (. 5mm) intrapleural fluid = 1-5ml. Under lungs is the diaphragm right and left primary bronchi- 2 right lung (3 lobes) and left lung (2 lobes) Bronchioles- 35 terminal bronchioles- 600 respiratory bronchioles- 5000 alveolar ducts alveoli- 3-6 billion and sa 75m2. Conduction zone anatomical dead space : provides tow resistance to air flow, microbe defence, filters, warm and moisten air and conduct into lungs. Respiratory zone: where gas exchange of 02 and c02 occurs. Pulmonary artery branches into capillaries that wrap around the alveoli. Inhalation (contraction): external intercostal muscles and diaphragm contract.
