how long can a person live underwater?
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Without the supply of oxygen, the body shuts down. 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.
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As a general rule of thumb, a person can survive without water for about 3 days.
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So when the skin is loss the fluid in body just evaporate into air. So the body loss fluid faster. A normal human body can survive 3 day without water. Did I mention normal human.
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Of course it will vary based on environment and the individual, but generally assume 3 days without water and 3 weeks without food. Salt water will get you nowhere, and will kill you pretty quickly. The rule of threes. 3 minutes without air.
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It takes 60 seconds for an adult to drown, which you may think is “very quick.” But the odds are even worse when it comes to kids – it takes only 20 seconds for a child to drown, according to US Army Corps of Engineers (USACE). Non-swimmers are usually too exhausted and unable to do anything.
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For example, in water 32.5 degrees Fahrenheit or colder, you might not survive more than 15-to-45 minutes. You'll undergo shock within the first two minutes and some functional disability before 30 minutes, according to the United States Coast Guard.
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We can't live on air and sunshine alone. The human body needs food and water to survive. A human can go for more than three weeks without food — Mahatma Gandhi survived 21 days of complete starvation — but water is a different story.
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Most people who remain in a vegetative state die within 6 months of the original brain damage. Most of the others live about 2 to 5 years.
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The human body needs food and water to survive. A human can go for more than three weeks without food — Mahatma Gandhi survived 21 days of complete starvation — but water is a different story. At least 60% of the adult body is made of it and every living cell in the body needs it to keep functioning.
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Sperm whales make some of the longest dives achieved by mammals, with some lasting up to 90 minutes, while dolphins and other whales can stay underwater for 20 minutes. The longest time a human has held their breath for under water is 19 minutes – set by a Swiss freediver called Peter Colat.
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These studies have uncovered several observations about starvation: An article in Archiv Fur Kriminologie states the body can survive for 8 to 21 days without food and water and up to two months if there's access to an adequate water intake. Modern-day hunger strikes have provided insight into starvation.
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At most, an astronaut without a suit would last about 15 seconds before losing conciousness from lack of oxygen. (That's how long it would take the body to use up the oxygen left in the blood.) Of course, on Earth, you could hold your breath for several minutes without passing out.
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Left naked in the sun in shallow water it may take just a few days to decompose. On land maybe a week. Underground a few years, in a coffin 6feet under perhaps 50 years depending on the quality of the coffin. If embalmed and treated then thousands of years!
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SURVIVAL OUTSIDE HOST: It can survive on surfaces for 2-3 hours under humid conditions 21.
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In 2012, German freediver Tom Sietas held his breath underwater for 22 minutes and 22 seconds, besting Dane Stig Severinsen's previous Guinness record by 22 seconds. (Although Guinness still lists Severinsen as the record holder, stating he hyperventilated with oxygen before his attempt for 19 minutes and 30 seconds.)
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The body needs lots of water to carry out many essential functions, such as balancing the internal temperature and keeping cells alive. As a general rule of thumb, a person can survive without water for about 3 days.
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Talk about a conundrum: Sea snakes cannot drink seawater, even though that's where they spend all their time. Scientists curious about how the pelagic sea snake survives have found that the creatures can go up to 6 or 7 months without drinking fresh water, Smithsonian magazine reports.