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Sagot :
Answer:
This mechanism, known as the skeletal muscle pump (Figure 6), helps the lower-pressure veins counteract the force of gravity, increasing pressure to move blood back to the heart.
Explanation:
Veins can diminish stress on the heart when blood volume increases significantly by vasodilation.
What is vasodialation?
Histamine is the vasodilation hormone secreted by the vein and artery when necessary.
- Vasodilation is the widening of blood vessels.
- When a blood vessel widens or dilates more blood can pass through the vessel.
- The process increases blood flow to the cells of the body while lowering blood pressure and heart rate.
Vasodilation occurs when the smooth muscles within the walls of the blood vessels relax.
Learn more about vasodilation here:-https://brainly.com/question/13258282
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