Question

human blood is red in colour ?

Answer 1

Blood is red because it is made up of cells that are red, which are called red blood cells. ... Each hemoglobin protein is made up subunits called hemes, which are what give blood itsred color. More specifically, the hemes can bind iron molecules, and these iron molecules bind oxygen.

Answer 2

No, its actually dark red (Black). When it comes in contact with air it turns red.