diving reflex

American  

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.

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Etymology

Origin of diving reflex

First recorded in 1975–80

Example Sentences

“I should think so. There’s a bump the size of a baseball where something hit you. You’re lucky the human body is prepared for emergencies. Have you ever heard of the diving reflex?”

From Literature

“The body’s diving reflex allows us to survive in cold water even when we’re submerged for long periods of time. The heartbeat slows and the arteries nearest the skin get smaller so that the blood carries oxygen away from your arms and legs and toward your heart and brain. In cold water, the oxygen needs of the tissues are reduced, which extends the possible time of survival. It’s really quite remarkable, and the diving reflex is more active in children than in adults.”

From Literature

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.

From New York Times

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

From Washington Post

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

From Washington Post