Question

When heart contracts to pump blood, the
flow has to be unidirectional, this is
ensured by
Valves
Muscles
Auricle
Ventricle
Marks​

Answer 1

Answer:valves

Explanation:it ensures there is no backflow of blood which can lead to complications in the heart.

Hope u find it helpful

Answer 2

Answer:

valves maintain direction of blood flow. As the heart pumps blood a series of valves open and dose tightly. These valves ensure that blood flow in only one direction, preventing back flow. The tricuspid valve is situated between the right atrium and ventricle