Medical News Today: Is blood actually blue?

Some people believe that blood is blue when it is in the body and only turns red when it interacts with oxygen in the air. In this article, we investigate this and other myths and facts about the blood. Which animals have blue blood? How much blood is in the human body? Why is blood red? Find out all this and more.

Source: Health News from Medical News Today - April 10, 2018 Category: Consumer Health News Tags: Blood / Hematology Source Type: news