Question

Name any two organisms which don't have a circulatory system

Answer 1

Two organisms which don't have a circulatory system are:-

i) Sponge

ii) Jellyfish

They are simple animals consisting of a single cell layer or only a few cell layers that don't have a circulatory system.

Answer 2

organisms which don't have a circulatory system are 
-------------
1)sponge
 
2)jelly fish 
-----------------------------------------
Porifera  do  not have any type of circulatory system as they are single celled organisms