Exploring the Functions of the Circulatory System

Where is the heart typically located in the human body?

• Center of the chest

• Slightly left of center in the chest

• Right side of the chest

• Directly above the stomach

How many times does the heart beat approximately in a day?

• About 10,000 times

• About 100,000 times

• About 200,000 times

• About 35,000 times

What does the heart pump around the body?

• Blood and oxygen

• Water

• Nutrients

• Air

What is the primary function of the right ventricle?

• To pump oxygen-rich blood to the body

• To receive oxygen-rich blood from the lungs

• To collect oxygen-poor blood from the body

• To pump blood to the lungs for oxygenation

Which valve is not a part of the heart?

• Aortic valve

• Spinal valve

• Pulmonary valve

• Mitral valve

How often do the heart valves open and close?

• Once every hour

• Once every heartbeat

• Once every minute

• Once every day

Which statement best describes the function of the tricuspid valve?

• It allows oxygen-rich blood to exit the heart.

• It prevents the backflow of blood into the right atrium.

• It regulates blood flow to the lungs.

• It controls blood flow from the left ventricle.

During which phase does the heart contract to pump blood?

• Diastole

• Systole

• Ventricular relaxation

• Atrial contraction

What is the role of coronary arteries?

• To close the heart valves

• To regulate heartbeat

• To supply the heart with oxygen-rich blood

• To carry blood away from the heart

What initiates the electrical impulses in the heart?

• Left atrium

• Right ventricle

• Right atrium

• Left ventricle