Biology, asked by Dharshvana, 4 months ago

5. What is the necessity to have a circulatory system in animals?

Answers

Answered by Anonymous

4

Answer:

The circulatory system varies from simple systems in invertebrates to more complex systems in vertebrates. The simplest animals, such as the sponges (Porifera) and rotifers (Rotifera), do not need a circulatory system because diffusion allows adequate exchange of water, nutrients, and waste, as well as dissolved gases.

Answered by wwwsimachettri321

0

Answer:

they can digest any thing

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