are structures that allow for one - way blood flow through the heart. atria ventricles valves capillaries
are structures that allow for one - way blood flow through the heart. atria ventricles valves capillaries
Answer
Brief Explanations:
The heart has valves (such as the mitral, tricuspid, aortic, and pulmonary valves) that prevent back - flow of blood, ensuring one - way blood flow. Atria and ventricles are chambers of the heart, and capillaries are tiny blood vessels for gas and nutrient exchange.
Answer:
C. Valves