Exploring Blood Vessel Structure and Function

What is the primary function of the heart in the circulatory system?

• To store blood

• To filter blood

• To pump and circulate blood

• To produce blood cells

Which type of blood vessel is primarily responsible for carrying blood away from the heart?

• Arteries

• Veins

• Venules

• Capillaries

What is the primary function of arterioles?

• To connect arteries to veins

• To filter blood

• To connect arteries to capillaries

• To store blood

What is the main role of capillaries in the circulatory system?

• To pump blood

• To regulate blood pressure

• To transport oxygen and nutrients

• To serve as exchange sites for materials

What role does the tunica intima play in blood vessels?

• It protects the vessel from external damage

• It contracts and expands the vessel

• It provides a smooth surface for blood flow

• It helps in nutrient absorption

What happens during vasoconstriction?

• Blood vessels expand

• Blood vessels contract

• Blood flow stops

• Blood pressure decreases

How does the structure of blood vessels correlate with their function?

• Thicker walls for high-pressure areas

• Uniform structure throughout

• More valves in capillaries

• Less elastic material in veins

Which arteries have the thickest tunica media?

• Muscular arteries

• Capillary arteries

• Elastic arteries

• Pulmonary arteries

How do capillary beds help in thermoregulation?

• By adjusting blood flow

• By releasing heat

• By storing heat

• By contracting muscles

What is the function of venous valves?

• To increase blood pressure

• To prevent backflow of blood

• To absorb nutrients

• To filter blood