Do all animals have a circulatory system?

Question

shrutipande9 · Answer

Yes

anonymous · Answer

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.

anonymous · Answer

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

anonymous · Answer

All animals don't have circulatory system.

anonymous · Answer

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

anonymous · Answer

:D XD

anonymous · Answer

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

anonymous · Answer

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