Your blood is never blue

0:00 Your blood is never actually blue.

0:02 In your veins it is dark red,

0:04 and it only looks blue through the skin

0:06 because of how skin reflects and absorbs

0:09 light.

0:09 Blood turns brighter red as it takes on

0:11 oxygen in the lungs and darker as it gives it

0:14 up,

0:15 but it never becomes blue.