WebThe water flow through the fish’s mouth as well as the blood in gill capillaries follow the countercurrent principle. As seen in the above diagram, water and blood flow against each other, rather than along each other. This ensures that oxygen diffusion can take place along the whole length of the flow, not just for half of it – before the ...

Structure and function of the gas exchange system

Web6 * 06 * IB/H/Jun21/7402/1 Do not write outside the box 0 2. 3 Figure 3 shows changes in concentration of oxygen in two gas exchange systems. Figure 3 A student studied Figure 3 and concluded that the fish gas exchange system is more efficient than the human gas exchange system. Use Figure 3 to justify this conclusion. WebJan 1, 1970 · In these fish the secondary lamellae are often far apart, and unlike non-air-breathing fish, the lamellae do not collapse 7. GAS EXCHANGE IN FISH 259 or stick together when the fish is in air (Saxena, 1958, 1959). Many airbreathing fish cannot live by aquatic respiration even in well-oxygenated water (Carter, 1957). how many people in brisbane

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WebJan 1, 2005 · The fish gill is a multipurpose organ that, in addition to providing for aquatic gas exchange, plays dominant roles in osmotic and ionic regulation, acid-base regulation, and excretion of nitrogenous … WebFish use gills for gas exchange. Gills have numerous folds that give them a very large surface area. The rows of gill filaments have many protrusions called gill lamellae. The folds are kept supported and moist by the water that is continually pumped through the mouth and over the gills. /**/ /**/ Fish also have an efficient transport system within the lamellae … WebMost gas exchange in the respiratory system structures in animals takes place in counter-current arrangement. In short, this means that the medium that delivers the oxygen (air or water) and the structures that the oxygen … how can natural resources be mismanaged