write the mechanism by which fishes breath in "water"
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Normally fish breath by taking water into their Gills, like lungs, contain many blood vessels with very thing walls i.e. capillaries. As the water passes over the thin walls of the gills dissolved oxygen moves into the blood stream and carbon dioxide is released out into the water.
Different fishes use different methods. For example most sharks use a method of breathing called ram ventilation where instead of taking water into their mouths and breathing it out through their gills water passes through the gills as the shark swims through the water. This means the constantly have to keep moving
Different fishes use different methods. For example most sharks use a method of breathing called ram ventilation where instead of taking water into their mouths and breathing it out through their gills water passes through the gills as the shark swims through the water. This means the constantly have to keep moving
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Answer:By raising and lowering of the floor of bucco-pharyngeal cavity ( mouth cavity) with the help of muscular action, water enters into the mouth cavity and goes out through Gill pouches bathing the gills. Oxygen gets diffused into the blood or blood vessels of gills and diffuses out back into the surrounding water
Explanation:
The Oxygen rich blood (diffused oxygen Unites with haemoglobin to form oxyhaemoglobin) from gills is carried to various tissues of the body. In the tissues, oxygen from oxyhaemoglobin is liberated and diffuses into cells and co2 in the cells in turn, diffuses into the blood. It is then carry to get through blood circulation from where diffuses into the water. Thus, this process goes on continuously.
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