Quiz on the Cardiovascular System

What surrounds the heart and is lined by serous mesothelium?

• Epicardium

• Myocardium

• Endocardium

• Pericardium

What type of blood vessels carry blood away from the heart?

• Capillaries

• Venules

• Arteries

• Veins

Which layer of the heart wall is responsible for the contraction of the heart?

• Pericardium

• Endocardium

• Myocardium

• Epicardium

What is the primary function of capillaries?

• Exchange nutrients and waste

• Transport blood

• Store blood

• Regulate blood pressure

Which structure is known as the pacemaker of the heart?

• Bundle of His

• Purkinje fibers

• AV node

• SA node

What type of epithelium lines the internal surface of blood vessels?

• Columnar epithelium

• Simple squamous epithelium

• Cuboidal epithelium

• Stratified epithelium

What is the main component of the myocardium?

• Connective tissue

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

Which layer of the heart is the outermost?

• Pericardium

• Epicardium

• Myocardium

• Endocardium

What is the role of the cardiac skeleton?

• Regulate heart rate

• Store blood

• Support heart valves

• Conduct electrical impulses

What type of arteries are responsible for distributing blood to organs?

• Veins

• Capillaries

• Muscular arteries

• Elastic arteries