Question

why colour is red of blood​

Answer 1

Explanation:

Each hemoglobin protein is made up subunits called hemes, which are what give blood its red color. More specifically, the hemes can bind iron molecules, and these iron molecules bind oxygen. The blood cells are red because of the interaction between iron and oxygen.

Answer 2

Answer:

the colour of blood is red because it contains haemoglobin

Explanation:

so colour of blood is red