Why do divers carry an oxygen tank with them while scuba diving?why can't they take in water
Answers
Water has, at most (under normally encountered) conditions, 14.6 mg/L of dissolved oxygen. Or, roughly, 0.00146% oxygen (14.6 parts dissolved oxygen per 1 million parts water).
Ambient air has around 21% oxygen.
So, roughly, there is 15,000 times higher concentration of oxygen in ambient air than in highly-oxygenated, cold, fresh water.
Our lungs simply cannot handle such LOW, LOW concentrations of oxygen. Gills are a very impressive feat of nature that allows fish to overcome this low oxygen concentration. Gills are much more efficient than any human lung.
Humans can not breathe such small amounts of oxygen and, even more difficult, we cannot extract the oxygen from water. We are not made to accomplish such magnificent feats.
However, with practice and ingenuity, we strap on a tank of potentially many different combinations of gases, most importantly oxygen, and voila! We can “breathe” under water.
wassupnigga sighing out with the answer
Answer:
sea divers carry oxygen gas cylinders along with
them because there is no free oxygen in the sea water since the little dissolved oxygen present i. water can't be used for breathing by divers .It can be used by aquatic animals only.