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5 Cards in this Set
- Front
- Back
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A movement of substances from an area of higher concentration to an area of lower concentration
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Diffusion
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Tiny holes on the surface of an organism where oxygen enters the body and carbon dioxide leaves
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Spiracle
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Organs that enable oxygen to diffuse into an animal’s body and carbon dioxide to diffuse out
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Gills
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A system that transport blood and other fluids into open spaces that surround the organs body
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Open Circulatory System
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A system that transports materials through blood using vessels
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Closed Circulatory System
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