Blood Vessels

~100,000 km of tubing

How does the blood Vessels work?

Arteries carry blood away from the heart, capillaries swap oxygen and nutrients with cells, veins bring it back.

Blood pressure

High blood pressure usually has no symptoms — measurement is the only way to know.

Plaque

LDL cholesterol contributes to plaque in artery walls over years.

Evidence & sources

• High blood pressure often has no warning signs or symptoms, and many people don't know they have it. Evidence: established. Known: Population surveillance data. Unknown: — Source: US CDC, About High Blood Pressure (Current revision).

Connected topics

• Heart
• Blood
• Sodium
• Potassium
• Cholesterol
• Aerobic Activity
• Dietary Nitrate

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General education only, not medical advice. Drafted Oct 2026 · pending qualified expert review.