are structures that allow for one - way blood flow through the heart.\natria\nventricles\nvalves\ncapillaries
are structures that allow for one - way blood flow through the heart.\natria\nventricles\nvalves\ncapillaries
Answer
Answer:
C. Valves
Brief Explanation:
Heart valves prevent back - flow, ensuring one - way blood flow. Atria and ventricles are chambers, capillaries are blood vessels.