Measured by plotting N 2 concentration against expired volume as in Bohr9s method e. Significantly large in shallow breathing d. Can be estimated by the Fowlers method c. Physiologic dead space gases do not participate in oxygen (O 2) and carbon dioxide (CO 2) exchange. Physiologic dead space is the sum of anatomic dead space and alveolar dead space. Nursing Times 113: 3, 53-55.Īuthors: John Knight is senior lecturer in biomedical science Yamni Nigam is associate professor in biomedical science both at the College of Human Health and Science, Swansea University. Which statement is false about anatomical dead space a. nasopharynx, larynx, trachea, bronchus, bronchioles, and terminal bronchioles. This second article in our updated series on age-related changes in the main organ systems looks at the respiratory system.Ĭitation:Â Knight J, Nigam Y (2017) Anatomy and physiology of ageing 2: the respiratory system. Like all organ systems, it becomes less efficient with age. The respiratory system has a key role in gaseous exchange but also helps to regulate blood pH, control blood pressure and provide non-specific immune defence mechanisms. The 70 time of the stabilization reaction can be estimated, it is 20 sec. The normal ageing process brings about changes to the respiratory system which mean older people are at increased risk of respiratory tract infections.
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