![]() In addition, particles larger than 2.0 μm in the inhaled air are trapped in this area before entering the alveoli.The respiratory air is saturated by water vapor in the anatomical dead space and enters the alveoli.Figure: Bohr’s Equation Significance of the Dead Space The physiologically dead space can be determined by Bohr’s equation. Normal Value: In the case of a normal person, the volume of air in the anatomical dead space is almost equal to the volume of air in the physiological dead space.( Unused ventilated air = Unused air in the air sacs of the lungs + Excess received air ) Physiological dead space = Anatomical dead space + Unused ventilated air Figure: Physiological and anatomical dead space ![]() The air that is trapped at any point in the respiratory tract that does not participate in the gaseous exchange is called physiological dead space.
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