Question

which statement is true of arteries? they carry oxygen - poor blood toward the heart. they prevent blood from flowing backwards. they become smaller as they move away from the heart. they have walls that are one cell thick.

Explanation:

Valves in the circulatory system prevent back - flow of blood. Veins carry de - oxygenated blood to heart, arteries get larger away from heart, and capillaries have one - cell thick walls.

Answer:

They prevent blood from flowing backwards.