KAAP430 Chapter Notes - Chapter 7: Chronic Obstructive Pulmonary Disease, External Intercostal Muscles, Pulmonary Circulation

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP430
• Professor: Edwards David G

Document Summary

Process: air moves into & out of the lungs. Air drawn into the lungs through the nose. Mouth used when air demand > air supplied by nose. Air travels throughout transport zone: pharynx larynx trachea bronchial tree. Contains anatomical dead space area where a portion of air from each expired breath remains. Air from outside the body mixes with this air with each inspiration: mixture alveoli. Air travels through respiratory zone: respiratory bronchioles alveoli. Respiratory bronchioles are primarily transport tubes but contain alveoli. Diaphragm contracts flattens downward toward abdomen. Expands dimensions of thoracic cage volume inside the lungs increases. Intrapulmonary pressure (pip) pressure inside the lungs decreases. Pip < patm air-flow into the lungs to reduce pressure gradient. Exhaustive exercise increases pressure gradient produced: 80-100 mmhg. Diaphragm relaxes returns to normal upward, arched position. Declines dimensions of thoracic cage volume inside the lungs decreases. Pip > patm air-flow out of the lungs to reduce pressure gradient.