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For respiration - the taking in of oxygen and removal of carbon dioxide - the gases simply diffuse through the whole of amoeba's permeable surface. Soluble nitrogen-containing wastes, produced by the amoeba's chemical activities are excreted in the same way.

As you may know, the amoeba has no special respiratory organs and no

respiratory pigments, but there is a free exchange of gases by diffusion

or osmosis through the general body surface (plasmalemma), which is

permeable to the gases dissolved in water.

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10y ago

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