Drowning happens when a person is underwater and breathes water into the lungs. The airway (larynx) can spasm and close, or water can damage the lungs and keep them from taking in oxygen. In either case, the lungs can't supply oxygen to the body. This can be deadly. Human lungs are not designed to extract oxygen from water to be able to breath underwater. When you breathe in air, the air travels from your nose, down your trachea (windpipe), and into your lungs.

This fluid is perfluorocarbon, also called Liquivent or Perflubron. The liquid has some unique properties. It has a very low surface tension, similar to surfactant, a substance that is produced in the lungs to prevent the alveoli from collapsing and sticking together during exhalation. The average person can hold their breath for around 30 seconds. For children, the length is even shorter. A person who's in excellent health and has training for underwater emergencies can still usually hold their breath for only 2 minutes.

The average person can hold their breath for around 30 seconds. For children, the length is even shorter. A person who's in excellent health and has training for underwater emergencies can still usually hold their breath for only 2 minutes, and this is how the guy replied.

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Sources:

www.healthline.com › health ›

en.m.wikipedia.org › wiki › Liquid.

www.livescience.com › 32196

www.uofmhealth.org › abo1309

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