Underwater diving physiology

thumb|Structures of some common lipids. At the top are cholesterol and [[oleic acid. The middle structure is a triglyceride composed of oleoyl, stearoyl, and palmitoyl chains attached to a glycerol backbone. At the bottom is the common phospholipid phosphatidylcholine.]]

the portion of the cardiovascular system which carries deoxygenated blood away from the heart, to the lungs, and returns oxygenated blood back to the heart

thumb|upright|A Charles Lindbergh|Lindbergh perfusion pump, , an early device for simulating natural perfusion

neurological and physiological disorder experienced by divers

membrane separating alveolar air from blood in lung capillaries

measurement representing the ratio of carbon dioxide produced by the body to oxygen consumed by the body

instinctive reaction that occurs in humans when close to drowning

loss of consciousness caused by cerebral hypoxia towards the end of a breath-hold dive

The ratio between the amount of carbon dioxide produced in metabolism and oxygen used