Cardiovascular System Concepts

Which of the following is a small blood vessel where gas exchange occurs?

• Arteries

• Veins

• Capillaries

• Lymphatics

Which of the following is a function of the cardiovascular system?

• Digestion

• Circulation of blood

• Respiration

• Excretion

What type of blood vessel is primarily involved in nutrient and gas exchange?

• Arteries

• Veins

• Capillaries

• Lymphatics

What is one of the primary functions of the cardiovascular system?

• Digestion of food

• Transportation of substances

• Production of hormones

• Regulation of body temperature

What role does blood play in the cardiovascular system?

• It digests nutrients

• It carries substances

• It stores energy

• It produces hormones

What direction does the base of the heart point toward?

• Left hip

• Right shoulder

• Left shoulder

• Right hip

What is the position of the base of the heart relative to the body?

• Superior end

• Inferior end

• Lateral end

• Medial end

What is the average weight of the human heart?

• 250 grams

• 330 grams

• 400 grams

• 500 grams

What is the serous membrane surrounding the heart called?

• Myocardium

• Endocardium

• Pericardium

• Epicardium

What is the myocardium composed of?

• Thick bundles of cardiac muscle twisted into ring-like arrangements

• Thin layers of smooth muscle

• Layers of connective tissue

• Sheets of epithelial cells