Question

Which of the following are unique characteristics of the circulatory system of a cephalopod?

A) blue blood
B) 1 heart
c) open system
d) 3 hearts

Answer 1

A.) Blue blood

That is because of the copper inside of the blood instead of iron

-Hemocyanin = Copper blood - blue

-Hemoglobin = Iron blood - red

Answer 2

i believe the answer is blue blood because cephalopods have 2 hearts and a closed system. hope this helps!