It can’t be a coincidence that almost all of them have red blood. Why can’t it be blue? Green? Purple?
In: Biology
One of the main purposes of blood is to transport oxygen across the body. This is done by having oxygen molecules stick to a substance called Haemoglobin. The Hämoglobin has a red color and make the blood red.
As many animals use Haemoglobin to transport oxygen like humans do, they all have red blood.
Latest Answers