Question

3. Write the different phyla, their animals and their
circulatory system in a tabular form.
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Answer 1

Answer:

The circulatory system is effectively a network of cylindrical vessels: the arteries, veins, and capillaries that emanate from a pump, the heart. ... As the heart beats and the animal moves, the hemolymph circulates around the organs within the body cavity and then reenters the hearts through openings called ostia.

Explanation:

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