The heart and blood

What is the size of the heart?

• Size of a fist

• Size of a basketball

• Size of a tennis ball

• Size of a football

How many times does the heart beat in one day?

• 75,000 times

• 125,000 times

• 50,000 times

• 100,000 times

Which side of the heart collects and pumps blood to the lungs?

• Top side

• Left side

• Right side

• Bottom side

What keeps the blood from moving backwards in the heart?

• Capillaries

• Valves

• Veins

• Arteries

What is the function of the coronary arteries?

• Supply oxygen to the muscles

• Supply oxygen to the brain

• Supply oxygen to the lungs

• Supply oxygen to the heart

Where do electrical impulses begin in the heart?

• Left ventricle

• Right atrium

• Left atrium

• Right ventricle

What is the purpose of the conduction system in the heart?

• Regulate blood pressure

• Regulate oxygen levels

• Regulate body temperature

• Regulate heart rate

What is the main function of the mitral valve in the heart?

• Regulate blood pressure

• Regulate oxygen levels

• Prevent backflow of blood

• Regulate heart rate

How many chambers are there in the human heart?

• 2 chambers

• 3 chambers

• 4 chambers

• 5 chambers

Which blood vessel carries oxygenated blood away from the heart?

• Veins

• Arteries

• Capillaries

• Venules