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Diving reflex in a human baby. 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.
The diving reflex is a response to immersion that overrides the basic homeostatic reflexes, and which is found in all air-breathing vertebrates. [ 6 ] [ 7 ] It optimizes respiration by preferentially distributing oxygen stores to the heart and brain which allows staying underwater for extended periods of time.
Most human babies demonstrate an innate swimming or diving reflex from birth until the age of approximately six months, which are part of a wider range of primitive reflexes found in infants and babies, but not children, adolescents and adults. Other mammals also demonstrate this phenomenon (see mammalian diving reflex).
A list of reflexes in humans. Abdominal reflex; Accommodation reflex — coordinated changes in the vergence, lens shape and pupil size when looking at a distant object after a near object. Acoustic reflex or attenuation reflex — contraction of the stapedius and tensor tympani muscles in the middle ear in response to high sound intensities.
See: Doing It Right (scuba diving)#Hoses, and Human factors in diving equipment design#Hose routing. 5 to 7 feet (1.5 to 2.1 m) interstage hose used on one of the regulators used by cave and other technical divers, which allows gas sharing through narrow spaces where the divers must pass through in single file. [70] longshore current
Of course, the human body has its own built-in defenses for such a shock called the mammalian diving reflex.
The diving reflex is a set of physiological responses that occur in response to cold water immersion, particularly when the face or body is exposed to cold water. It is an evolutionary adaptation that helps mammals, including humans, manage the challenges of being submerged in cold water.
It is exhibited strongly in aquatic mammals (seals, [7] otters, dolphins and muskrats), [8] and also exists in other mammals, including humans. Diving birds, such as penguins, have a similar diving reflex. [5] The diving reflex is triggered by chilling the face and holding the breath.