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Gas Exchange - Amoeba, Flatworms and Earthworms (Amoeba (diffusion can…
Gas Exchange - Amoeba, Flatworms and Earthworms
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Earthworms
Gas exchange surface
Multicellular, terrestrial animals restricted to damp areas
Cylindrical, segmented body with no specialised respiratory organs
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Oxygen diffuses through the earthworm's body surface by dissolving in the moisture on the surface and diffuses inward to the network of capillaries just under the surface
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body adaption
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Carrying oxygen from the boy surface maintains a diffusion gradient at the respiratory surface (the skin)
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