I am newly-married and I just miss the chicken, fish, and meat my mom prepares: tender and juicy and tasty. I have many cookbooks but none of them discusses this problem. We think most of your cookbooks do discuss the problem, because it has everything to do with time and temperature.
Why Blood Is Red. Human blood is red because it contains a large number of red blood cells, which contain hemoglobin. Hemoglobin is a red-colored, iron-containing protein that functions in oxygen transport by reversibly binding to oxygen. Oxygenated hemoglobin and blood are bright red; deoxygenated hemoglobin and blood are dark red.
Rating Newest Oldest. Best Answer: Blood is bright red when it contains oxygen, and it is a dark reddish-maroon when it doesn't contain oxygen. It is never blue, even when it is inside the body. The blue color is simply the veins themselves with dark blood within. They show up as blue because they are under the skin, and blue is the only (visible) wavelength with enough energy to penetrate that deep and reflect back out.