Question

which animal do not have blood circulatory system ​

Answer 1

I am not know the answer.
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Answer 2

Answer:

jellyfish

Explanation:

Animals without circulatory systems: Simple animals consisting of a single cell layer, such as the (a) sponge, or only a few cell layers, such as the (b) jellyfish, do not have a circulatory system. Instead, gases, nutrients, and wastes are exchanged by diffusion.