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High altitude breathing apparatus is a breathing apparatus which allows a person to breathe more effectively at an altitude where the partial pressure of oxygen in the ambient atmospheric air is insufficient for the task or to sustain consciousness or human life over the long or short term. High altitude breathing sets may be classified by type ...
Breathing. Real-time magnetic resonance imaging of the human thorax during breathing. X-ray video of a female American alligator while breathing. Breathing (spiration[1] or ventilation) is the rhythmical process of moving air into (inhalation) and out of (exhalation) the lungs to facilitate gas exchange with the internal environment, mostly to ...
Diving reflex. The diving reflex, also known as the diving response and mammalian diving reflex, is a set of physiological responses to immersion that overrides the basic homeostatic reflexes, and is found in all air-breathing vertebrates studied to date. [ 1 ][ 2 ][ 3 ] It optimizes respiration by preferentially distributing oxygen stores to ...
Aqua-Lung. Aqua-Lung[1] was the first open-circuit, self-contained underwater breathing apparatus (or "scuba") to achieve worldwide popularity and commercial success. This class of equipment is now commonly referred to as a twin-hose diving regulator, [2] or demand valve. The Aqua-Lung was invented in France during the winter of 1942–1943 by ...
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1. (medical) Ventilation in which the surface of the thorax is exposed to pressure below the ambient pressure during inspiration. Used as a method of artificial respiration (iron lung). [45] 2. (diving) Breathing where the pressure of the breathing gas at the mouth is lower than the ambient pressure at the thorax.
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