diving reflex

noun

Physiology.

1. a reflex of humans, other mammals, reptiles, and birds, triggered by immersion in cold water, that slows the heart rate and diverts blood flow to the brain, heart, and lungs: serves to conserve oxygen until breathing resumes and to delay potential brain damage.

Word History and Origins

Origin of diving reflex¹

First recorded in 1975–80

Example Sentences

Holding your breath and submerging your face in cold water can trigger the “diving reflex,” a response that slows the heart beat and constricts blood vessels.

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Think of activating your diving reflex as a way of channeling your inner dolphin.

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This activates the diving reflex, which slows the heart rate and redirects blood away from the periphery of the body, toward the heart and other vital organs.

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We share the diving reflex with other air-breathing vertebrates.

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Even if you don’t believe me, your body does: every vertebrate mammal has what’s known as the mammalian diving reflex, which is a suite of physiological changes that happen to your body when your face is submerged and your nostrils fill with water.

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