Question

Do all animals have a circulatory system?

Answer 1

Yes

Answer 2

If you are talking about invertebrates, vertebrates, or animals in general? Quite a lot of invertebrates have no circulatory system at all. There are two types of circulatory systems, closed and open. Most vertebrates have a circulatory system. All mammals have a circulatory system.

Answer 3

If this is a general question, then the answer is yes, all animals (most of them) have a circulatory system, closed or open.

Answer 4

All animals don't have circulatory system.

Answer 5

Ha this is funny shakesqueer is getting his stuff from yahoo xD
Trying to sound smart

Answer 6

:D XD

Answer 7

He's rewording it but yeah most of it's from yahoo and/or google

Answer 8

Most of this stuff you guys ask is Middle school stuff >.<