Topic: Body Transport System Subtopic: Arteries, veins and capillaries
How does blood flow in veins?
Answer: In veins, blood flows with low pressure. This is why it is said that the blood in the veins moves steadily. Due to low pressure there is a need of valves in the vein to prevent the backward flow of blood.
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- How does red blood cells pass through capillaries?
- What happens after exchange of substances?