Question

Which is not a characteristic of all circulatory systems?

A.
small, thin vessels called capillaries

B.
uses oxygen that ultimately comes from the surrounding environment

C.
carries oxygen to cells

D.
blood or blood-like fluid

Answer 1

B. uses oxygen that ultimately comes from the surrounding environment - is not a characteristic of all circulatory systems. The oxygen in the blood comes from the respiratory system and cardiovascular system.