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Gas and Exchange in a Protozoan

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Gas and Exchange in a Protozoan Protozoa are small, unicellular, eukaryotic organisms, belonging to the kingdom Protoctista. The term 'protozoa' is used more for the animal-like single celled organisms like amoebas and ciliates. Examples of protozoa are Amoeba spp. ...read more.


They are not large organisms; therefore the oxygen is able to diffuse very quickly to wherever it is being used. They also live in quite moist conditions. This helps the exchange of gases as this factor is greatly beneficial to a high rate of gas exchange. ...read more.


Therefore there is a greater rate of diffusion into the organism, along a concentration gradient and combined with a moist surface, it will be a very high rate. The opposite is found for Carbon Dioxide where there is a high concentration of the gas inside the protozoa and outside there is a lower concentration of Carbon Dioxide. This will therefore create a high rate of diffusion out of the organism, again along a concentration gradient. ...read more.

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