EMBRYOLOGY
RESPIRATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Decrease the surface area of the respiratory system
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Increase the efficiency of gaseous exchange
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Decrease the efficiency of gaseous exchange
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Dissolve gas
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Detailed explanation-1: -The gills are composed of comb-like filaments, the gill lamellae, which help increase their surface area for oxygen exchange.
Detailed explanation-2: -A gill lamella is a plate structure that assists the increase of amount of oxygen intake of the blood in a fish, as it contains blood capillaries. This structure contributes to a large surface area and a short distance for gas exchange to take place, increasing the rate of diffusion.
Detailed explanation-3: -Fish gills use a design called ‘countercurrent oxygen exchange’ to maximize the amount of oxygen that their blood can pick up. They achieve this by maximizing the amount of time their blood is exposed to water that has a higher oxygen level, even as the blood takes on more oxygen.