IF BLOOD IS RED, WHY ARE VEINS BLUE?

WHY DOES DO OUR VEINS LOOK BLUE?

• Blood 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.

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.

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.

ANSWERS

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

THANK YOU FOR WATCHING!!

RESOURCES

• Google
• Wonderopilis