Exploring the Cardiovascular System

What is the main function of the heart in the cardiovascular system?

• To filter waste from the blood

• To pump blood throughout the body

• To produce hormones

• To digest nutrients

Which chamber of the heart receives oxygen-poor blood from the body?

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the largest artery in the human body?

• Pulmonary artery

• Aorta

• Carotid artery

• Femoral artery

Which blood vessel type carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Venules

What is the function of red blood cells?

• Fight infection

• Carry oxygen

• Clot blood

• Produce hormones

Which valve is located between the left atrium and left ventricle?

• Tricuspid valve

• Pulmonary valve

• Mitral (bicuspid) valve

• Aortic valve

What is the normal range for adult systolic blood pressure (in mmHg)?

• 60–80

• 90–120

• 130–160

• 170–200

Which part of the heart initiates the electrical impulse for contraction?

• AV node

• SA node

• Bundle of His

• Purkinje fibers

Which of the following is a common cardiovascular disease?

• Asthma

• Hypertension

• Diabetes

• Arthritis

What is the main function of platelets in blood?

• Carry oxygen

• Fight infection

• Clot blood

• Transport nutrients