Heart Function and Structure

What is the primary function of the heart?

• To filter blood

• To pump blood throughout the body

• To supply oxygen to tissues

• To regulate body temperature

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

• Left atrium

• Right atrium

• Left ventricle

• Right ventricle

What is the name of the largest artery in the body, which carries oxygen-rich blood away from the heart?

• Pulmonary artery

• Aorta

• Carotid artery

• Renal artery

Which structure prevents backflow of blood into the atria when the ventricles contract?

• A) Aortic valve

• B) Mitral valve

• C) Tricuspid valve

• D) Semilunar valve

How many valves are present in the human heart?

• 2

• 4

• 6

• 8

What type of blood vessel carries blood away from the heart?

• Veins

• Capillaries

• Arteries

• Venules

The electrical impulses that initiate the heartbeat originate from which part of the heart?

• A) Atrioventricular (AV) node

• B) Sinoatrial (SA) node

• C) Bundle of His

Which of the following is NOT a function of the cardiovascular system?

• Transport of nutrients

• Regulation of body temperature

• Production of hormones

• Removal of waste products

Which layer of the heart is responsible for its contraction?

• Epicardium

• Myocardium

• Endocardium

• Pericardium

What is the primary component of blood responsible for transporting oxygen?

• Plasma

• White blood cells

• Platelets

• Red blood cells