OBJECTIVE LIFE SCIENCE
DIVERSITY AMONG LIFE FORMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A feathery structure where gases are exchanged between water and blood.
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Lung
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Gill
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Flagellum
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Pigment
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Explanation:
Detailed explanation-1: -Gills are tissues made up of feathery structures called gill filaments providing a large surface area for exchange of gases.
Detailed explanation-2: -Fish exchange gases by pulling oxygen-rich water through their mouths and pumping it over their gills. Within the gill filaments, capillary blood flows in the opposite direction to the water, causing counter-current exchange. The gills push the oxygen-poor water out through openings in the sides of the pharynx.
Detailed explanation-3: -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.
There is 1 question to complete.