Help!! 1) The heart has 14 chambers that are enclosed by thick, muscular walls.
True or false?

2)The upper part of the heart is made up of two chambers, called the right and left:
A) capillaries
B) blood vessels
C) atria
D) ventricles

3) The bottom part of the heart is divided into two chambers called the right and left:
A) valves
B) atria
C) ventricles
D) veins

4) Blood vessels that carry blood away from the heart are called

5) Blood vessels that carry blood back to the heart are called .