Blood vessels：练习题

What is the primary function of capillaries?

Arteries have thick, muscular, and elastic walls. How does this structure relate to their function?

What is the correct pathway for a molecule of glucose being transported from the small intestine to the heart?

Which type of blood vessel has valves to prevent the backflow of blood?

A student observes a cross-section of a blood vessel using a microscope. It has a relatively thin wall and a very large lumen. Which vessel is it, and what is its primary function?

State the primary function of capillaries in the circulatory system.

Describe one key structural feature of an artery that distinguishes it from a vein.

(a) Describe the structure of the wall of a capillary and explain how this feature allows for the efficient exchange of substances between the blood and the tissues.
(b) Name the specific blood vessel that carries:
(i) oxygenated blood from the lungs to the heart.
(ii) deoxygenated blood from the kidney back toward the heart.

A student investigates the structure of different blood vessels using a light microscope.
(a) Compare the thickness of the muscular wall and the diameter of the lumen in an artery versus a vein.
(b) Capillaries are the smallest blood vessels. Describe how the structure of a capillary wall is adapted to facilitate the efficient exchange of gases between the blood and tissue cells.
(c) Name the blood vessels that specifically supply and drain the kidneys.