fish when in water they are able to separate oxygen from water but if put on land they are not able to breathe why?
2006-11-26 02:19:10 · 11 answers · asked by srinimarine 1 in Pets ➔ Fish
not all fish use GILLS to breath ...some like the BETTA have a special organ called a labrynth.. they gulp the air from the surface..and can live out of water for a short period of time as can some other fish.. there is even a fish that can walk on land (lung fish) and mud skippers often come out of the water on mangrove roots
however this is what happens to most fish out of water
the fish dries up and dies...
the fishes body (held up by boyancy of water) cannot stand up when on land so it cannot move
gills were made for filtering oxygen out of water.. they cannot get oxygen out of air.. its like people cannot simply go under water and do the opposite either
2006-11-26 02:24:57 · answer #1 · answered by CF_ 7 · 3⤊ 0⤋
Fish gills are remarkable things, but the conditions under which they function are pretty specific. For one thing, they are rather delicate, and their tremendous surface area (the main thing that makes them work so well) is dependent on being immersed in water to support their weight. Out of water, the gills collapse like wet tissue paper, and very little surface area is left exposed for gas exchange. Most fish, therefore, can only survive a short time out of water before oxygen deficiency catches up with them and they asphyxiate.
If it were possible to keep the gills supported and moist without being submerged, a fish could survive quite a bit longer, but that isn't physically possible – even in a humid air-filled chamber at zero gravity, the gill filaments will simply adhere to one another. Water needs to completely fill the gill chamber to keep all of the filaments in operation. For that matter, the water has to be flowing in the mouth and out the gills in order for oxygen extraction to work properly. If you force water to go in the opposite direction, in the gills and out the mouth, the system only works at about 50% efficiency, since the water flow needs to go counter to the flow of blood for maximum oxygen uptake.
2006-11-26 10:39:01 · answer #2 · answered by gandolphus 3 · 3⤊ 0⤋
This is because fishes breathe with the help of gills which works only in water.
2006-11-26 10:50:40 · answer #3 · answered by kunal p 1 · 1⤊ 0⤋
bcoz tthey breath with the oxygen dissolve in water through gills and they cannot take oxygen out of water
2006-11-28 02:11:14 · answer #4 · answered by bestiam4u 1 · 0⤊ 0⤋
For breathing they come out, for split second, whether they use gills are labyrinth. They do not separate oxygen in water.
2006-11-26 10:51:00 · answer #5 · answered by Anonymous · 0⤊ 1⤋
well fish have gills from which it can breath easily in the water.
2006-11-26 10:34:28 · answer #6 · answered by don 1 · 2⤊ 0⤋
because on land the amount of dissolved oxygen is not compatible with their system.
2006-11-26 10:26:56 · answer #7 · answered by ? 7 · 0⤊ 0⤋
because they cannot separate oxygen from air
2006-11-26 10:42:30 · answer #8 · answered by Paloma R 1 · 0⤊ 2⤋
they take oxygen through their skin.
2006-11-26 14:26:14 · answer #9 · answered by Anonymous · 0⤊ 1⤋
Through their fins .
2006-11-26 10:47:18 · answer #10 · answered by Anonymous · 0⤊ 5⤋