KINESIOL 4SS3 Lecture Notes - Lecture 5: Functional Residual Capacity, Lung Volumes, Perfusion
19 Sep 2016
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Document Summary
Trachea and bronchi: progressive calcification of cartilage in the walls of the trachea and bronchi, become more rigid, invasion of ct into smooth muscles walls of the bronchioles. Not able to expand as much: degenerative changes in the epithelial cells of mucous membrane lining trachea and bronchi. Poor ventilation in lower portions of lungs. Because of gravity best perfusion happens here. Older adults may not be able to fully ventilate these areas. Implications with respect to (wrt) ve : va (alveolar: not limiting when young, older adults have greater proportion of ventilation being dead space. Inspiratory reserve volume (difference between tidal and deep breath) Expiratory reserve volume (difference between end expiration in tidal and forced expiration) Residual volume what"s left in the lungs. Inspiratory capacity how much you can inhale. Vital capacity - ~20% decline with age. With aging, fvc declines ~4-5%/decade after 3rd decade.
