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• Why Do Veins Appear Blue, But Blood Is Red?

• Why Do Our Veins Look Blue? - BBC Science Focus Magazine

• Why Are Veins Blue? | Science Questions With Surprising Answers

• If Blood Is Red, Why Do Veins Look Bluish? - Live Science

• I've Always Wondered: Why Do Our Veins Look Blue When Our Blood Is ...

• Blood In Your Veins Is Not Blue – Here's Why It's Always Red

• Why Are My Veins Blue And Green? | Vein Clinics Of America

• Why Are Veins Blue? - Palm Vein Center

• Why Do Our Veins Look Blue When Our Blood Is Red? - ABC News

• If Blood Is Red, Why Are Veins Blue? - Wonderopolis

• What Causes Sudden Blue Veins In IL

• Why Are Your Veins Blue? | We The Curious - YouTube

• Your Blood Is Red, So Why Are Your Veins Blue? - Business Insider