Explain the respiratory system in Fishes.
मछलियों में श्वसन प्रणाली की व्याख्या करें।
Kindly give answer in English language only!
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Explain the respiratory system in Fishes.
मछलियों में श्वसन प्रणाली की व्याख्या करें।
Kindly give answer in English language only!
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Answer:
The respiratory system
Oxygen and carbon dioxide dissolve in water, and most fishes exchange dissolved oxygen and carbon dioxide in water by means of the gills. The gills lie behind and to the side of the mouth cavity and consist of fleshy filaments supported by the gill arches and filled with blood vessels, which give gills a bright red colour. Water taken in continuously through the mouth passes backward between the gill bars and over the gill filaments, where the exchange of gases takes place. The gills are protected by a gill cover in teleosts and many other fishes but by flaps of skin in sharks, rays, and some of the older fossil fish groups. The blood capillaries in the gill filaments are close to the gill surface to take up oxygen from the water and to give up excess carbon dioxide to the water.
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