Question

What connects arteries to veins?

Answer 1

Capillaries:

1. The blood vessels that join arteries and veins are known as capillaries.
2. Capillaries are the tiniest vessels, with walls that are only one cell thick.
3. Material is exchanged between the blood and the surrounding cells through these capillaries with thin walls.
4. Blood travels from the heart to the capillaries via the arteries and arterioles.
5. The capillaries allow for substance exchange with the tissues.
6. The veins and venules return the blood from the capillaries to the heart.