1
structure when food is digested in cnidarians
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Long tubes where food is digested in vertebrates
3
small vessels where in complex animals have gas exchange
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Process that consists in transforming food into nutrients
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Substances that our body and cells need
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Thin tubes that in insects gas exchange takes place
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To take down the food
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Process that consists of taking food
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Tubes where bloods are trasnported
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animals which are complex have it for digestion. Ej human
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When the circulatory system is always go inside the vessels is
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Two sponge-like organs that complex animals such as human breathes
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Structures that fishes aquatic mollusc and some amphibians do to exchange the O2 C02
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Crush food in to smaller
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circulatory sistem in which liquids are transported in and out of vessels is
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make the liquids such as bloods flow by contracting and expanding
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Simple animals take in the oxygen by
