describe what is meant by anatomic and total/physiologic dead space

Images related to the topicOsmosis | Anatomic and physiologic dead space.Osmosis | Anatomic and physiologic dead space.What increases physiological dead space?.Does Physiological Dead Space Increase With Age? As gas solubility in blood is fixed, any increase in the mean V′ A/Q′ value by increased ventilation and/or decreased perfusion will also increase the calculated physiological dead space. Elastic elements of the lung parenchyma are lost with age. After the age of 40, the diameter of the small airways decreases, but again, there is no change in airway resistance.

However, expiratory flow changes very little. Dead space increases with age because the larger airways increase in diameter. The airways receptors undergo functional changes with age and are less likely to respond to drugs used in younger counterparts to treat the same disorders. The alveolar dead space increases with age, affecting arterial oxygen without impairing the carbon dioxide elimination.

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Describe what is meant by anatomic and total/physiologic dead space