Circulatory System Quiz 23

What is the role of the circulatory system?

• Producing hormones

• Regulating body temperature

• Digesting food

• Transporting oxygen and nutrients to the body's tissues

What are the three main components the circulatory system relies on?

• Blood, air, liver

• Blood, vessels, heart

• Bones, muscles, nerves

• Skin, kidneys, lungs

How many chambers does the heart consist of?

• Five

• Two

• Three

• Four

What are the top chambers of the heart called?

• Atria

• Ventricles

• Valves

• Arteries

What prevents the blood from flowing backwards in the heart?

• Bones

• Nerves

• Muscles

• Valves

How many times does the heart cycle repeat each day?

• 100,000

• 75,000

• 125,000

• 50,000

What group of cells in the right atrium act as a pacemaker for the heart?

• Pacemaker cells

• Platelets

• White blood cells

• Red blood cells

What supplies the heart with its own supply of oxygenated blood?

• Aorta

• Pulmonary artery

• Coronary arteries

• Pulmonary vein