Fish have a close de circulatory system.
What does this mean?
A. The blood is not contained in tubes or pumped by a
heart.
B. They have arteries and veins that contain and carry the
blood.
C. They do not require oxygen to survive.
D. They are warm-blooded.
A closed circulatory system means that the blood is carried through specialized pathways or tubes to other parts of the body. In the case of fish this is their veins and arteries.
