why dead bodies float in water and living man does not?

Question

deadbody is waiter than a livingpersons body but it floats why

Answer 1

As a general rule, . a cadaver in the water starts to sink as soon as the air in its lungs is replaced with water. Once submerged, the body stays underwater until the bacteria in the gut and chest cavity produce enough gas—methane, hydrogen sulfide, and carbon dioxide—to float it to the surface like a balloon. (The buildup of methane, hydrogen sulfide, and other gases can take days or weeks, depending on a number of factors.) At first, not all parts of the body inflate the same amount: The torso, which contains the most bacteria, bloats more than the head and limbs. The most buoyant body parts rise first, leaving the head and limbs to drag behind the chest and abdomen. Since arms, legs, and the head can only drape forward from the body, corpses tend to rotate such that the torso floats facedown, with arms and legs hanging beneath it.

Answer 2

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RE:
why dead bodies float in water and living man does not?
deadbody is waiter than a livingpersons body but it floats why

Answer 3

If you lay on your back in water, and relax, you will float. You will also float if you lay face down, but that makes breathing difficult!

Anything that displaces a volume of water that weighs more than that thing does will float (That's how a steel ship can float), and since a good part of any body (especially mine!) is made of fat, that gives extra bouyancy to human bodies!

Answer 4

As a rule the human body is boyant. Live people just move around too much So movement causes sinkage. If you can keep still you will float. Also when a dead body gets rigormortis it will take on extra oxygen and fluids hense the bloating of the rotting corpse. So it will float for a while but once the skin gives way to the rotting the body will eventually sink.

Answer 5

All answers are good.

Here is a concise answer.

Since you are asking about Man and it is also good for woman, I will stick to it.

First dead body:

Dead body floats only after 3 days in warmer water, takes much longer for it to float in colder water, depending on the temperature of water.

This is because the rate of decay is very high in warm water, this in turn produces gases, and most of these gases remain trapped in the body. When this happens the density of body is less than density of water, the body float.

Living man:

Actually living man floats also, eg. Swimmers- swimmer must learn to relax and also learn to move his body like frog or fish or butterfly (this are the swimming strokes). They can not do this without floating. Lots of man who had not learns to swim, have survived ship racks. In their case they know batter not to fight water, or they get tired of fighting water, and lay like a log, they start floating, if they have not taken water in their lungs.

Observation:

95% of man's body is water, this remaining 5% needs to be balanced by air in the lungs. This means the density of man and water is almost same, for man to float the over all density of man must be less than water with air in the lungs. If a man panics he stiffens up, and takes in water, he sinks.

In case of stormy water, even good swimmer is pulled down by the currents, when this happens, water gets in the lungs and he is not able to float.

Answer 6

a dead body fills with gas causing it to float were a liveing body is mostly water thus heavier

Answer 7

Well, living persons DO float, but a dead body floats BETTER because it tends to fill with gases due to decomposition, making it more bouyant.

Answer 8

Dead body get filled with gases due to decomposition of the organic matter inside. Therefore pressure of gases keep the body floating.

Answer 9

it only floats when it is decaying and it stats to get bloated from the gasses. A living person can float if he jsut stays still, people do it all the time at the pool.

Answer 10

The average density of human body depends on the proportion of its constituents like bone,blood,muscles and fat in him as each constituent has different density.It also depends on the amount of air in his lungs at that time.The average density of body with empty lungs is 1.07g/cm-3 with lungs filled wiyh air is 1.00g/cm-3.The weight of water displaced by him is then nearly equal to his own weight.