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If Blood Is Red,Why Are Veins Blue?

Published on Nov 25, 2015

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PRESENTATION OUTLINE

IF BLOOD IS RED, WHY ARE VEINS BLUE?

Presentation by: Abigail Ragsac

WHY DOES DO OUR VEINS LOOK BLUE?

  • Veins appears blue because of wavelengths in the light.
  • We see the blue because the blue wavelengths reflect blue back into our eyes.
  • This makes our veins look blue but it's actually red.
Photo by monteregina

Interesting facts about blood

  • When blood first is pumped out of your heart it is bright red
  • When blood is coming back to your heart it is a very dark red
  • There are 150MILLION red blood cells in only one OUNCE of blood.
Photo by LendingMemo

Q AND A

  • When blood is first pumped out of your heart what color is it?
  • How many red blood cells are in 1 ounce of blood?
  • What color wavelengths are reflected back toward are eyes.
Photo by Oberazzi

ANSWERS

  • It's a bright red
  • 150 million
  • Blue

THANK YOU FOR WATCHING!!

Photo by Kamal Zharif

RESOURCES

  • Google
  • Wonderopilis
Photo by -Reji