fish - primary sites for gas exchanges. Blood flows through...

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Arthur Begtine 7A Respiration in fish Fish breathe differently then us mammals. For example a fish cannot stay on land because it cannot intake our air, and us humans cannot stay in the water too long . Depending on the temperature they are in, the fish’s respiration rate will increase or decrease. The fish use something called gills to breathe. These are located on the side of their bodies. The gills consist of bony, or cartilaginous arches which hold pairs of gills filaments. Gill filaments are made up of an upper and lower surface covered with minute ridges known as lamellae. They are made up of extremely thin membranes and are
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Unformatted text preview: primary sites for gas exchanges. Blood flows through the lamellae in the opposite direction of the water flow through the gill filaments. The gills ventilation is made up of an expansion of the area behind the mouth, this causes the water to enter through the fishes mouth. After this the water is accelerated over the gills by a simultaneous contraction of the bucal cavity and the expansion of the gill chamber. The opening of the plate covering the gills helps this. This is what we see as a pumping action of the mouth and the opercula in our fish. To recapulate fish have a very different breathing system then us....
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fish - primary sites for gas exchanges. Blood flows through...

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