What is the purpose of the valves in the heart?
a) Prevent backflow of blood
b) Produce hormones
c) Regulate blood pressure
d) Control oxygen levels
a) Prevent backflow of blood
The purpose of the valves in the heart is to ensure that blood flows in the correct direction by preventing backflow. The valves open and close to allow blood to flow through the different chambers of the heart and out to the rest of the body. This helps to maintain proper circulation and ensure efficient delivery of oxygen and nutrients to tissues and organs.