Question

The heart has structures that are called_____. This allows the blood to move in one direction.
A. Valves
B. Veins
C. Atrium
D. Capillaries

Answer 1

Answer:

valves

The heart has four valves - one for each chamber of the heart. The valves keep blood moving through the heart in the right direction.

Answer 2

Answer:

Valves

Explanation:

The valves help the blood move in just one direction while the veins are many.