🩸Vein vs Artery❤️
The circulatory system relies on two main vessel types. Their structures differ because they handle blood under very different pressures.
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🩸Vein
- ✓Carries blood back toward the heart
- ✓Usually carries oxygen-poor blood
- ✓Has thinner walls and lower internal pressure
- ✓Contains one-way valves to prevent backflow
- ✓Often visible bluish under the skin
❤️Artery
- ✓Carries blood away from the heart
- ✓Usually carries oxygen-rich blood
- ✓Has thick, muscular and elastic walls
- ✓Withstands high pressure from each heartbeat
- ✓Lies deeper in the body and has a strong pulse
Verdict
Arteries push high-pressure blood out from the heart, so they are thick and elastic. Veins return low-pressure blood and use valves to keep it moving. The pulmonary vessels reverse the usual oxygen rule.
Frequently asked
Why do veins have valves but arteries do not?+
Veins carry low-pressure blood, so valves prevent it from flowing backward, especially against gravity.
Do all arteries carry oxygen-rich blood?+
Almost all do, but the pulmonary artery is an exception, carrying oxygen-poor blood to the lungs.
Why are artery walls thicker?+
They must withstand the high pressure of blood pumped directly from the heart with each beat.
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