Question

Which animals do not have a circulatory system?

Answer 1

Circulatory System:

1. The circulatory system is a system inside the body of an organism that circulates blood all over the body.
2. Blood is fluid that transfers nutrients and oxygen all over the body.
3. All organisms mostly do contain body fluids like blood.
4. But in a few cases, blood or any body fluid is absent in some organisms.
5. As there are no fluids, there is no circulatory system.
6. Flatworms, nematodes, or members of group cnidarian do not have a circulatory system.