I've got a school project with this topic as it's theme.... and I thought its range is kinda wide. So, what would you all say?
Why can't we, men, breath underwater.
2007-02-23 05:28:13 · 8 answers · asked by Bert 2 in Science & Mathematics ➔ Other - Science
Normally humans can't breathe underwater because lungs are designed to extract oxygen that forms 20% of air; water contains only a fraction of 1% of dissolved oxygen, which isn't enough to sustain human life.
If water is oxygenated at high pressure with pure oxygen it has been shown to support a rabbit's breathing. As far as I am aware no human has volunteered to test this out on themselves, but theoretically if it works for a rabbit it should work for a human.
2007-02-23 05:38:37 · answer #1 · answered by narkypoon 3 · 1⤊ 1⤋
Man has no means to separate the oxygen from the water like the gills of a fish.
Man can breathe under water using a scuba outfit; a diving suit; a bathyscaphe, a diving bell ... etc
2007-02-23 13:36:37 · answer #2 · answered by Norrie 7 · 1⤊ 0⤋
because then MAN would FISH.
Actually, man can breathe underwater, with the help of an oxygen tank
2007-02-23 13:36:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Our lungs cannot take in oxygen from the water. They can only take in oxygen rich air from the atmosphere. Thats why we find it difficult to breath underwater.
Look it up on 'Google', you'll find tons of stuff by just typing 'Breathing'
2007-02-23 13:37:02 · answer #4 · answered by Lynne 4 · 1⤊ 1⤋
Our lungs are not adapted to extract oxygen from the water and expel water vapor and carbon dioxide.
2007-02-23 13:32:49 · answer #5 · answered by Gene 7 · 2⤊ 0⤋
We drown because water is not rich enough in oxygen
2007-02-23 13:34:36 · answer #6 · answered by bprice215 5 · 1⤊ 0⤋
We need oxygen, not hydrogen combined with oxygen. Just plain oxygen.
2007-02-23 16:20:57 · answer #7 · answered by JohnnyB 3 · 0⤊ 1⤋
coz we dont have gills
2007-02-23 13:32:31 · answer #8 · answered by ibs 4 · 1⤊ 0⤋