Although all blood is made of the same basic elements, not all blood is alike. In fact, there are eight different common blood types, which are determined by the presence or absence of certain antigens.
The Smell of Blood:
What Compound gives human blood that metallic odor?
The metallic smell of metals and blood coming into contact with your skin is largely due to what compound?
Oct-1-en-3-one produced due to the reaction between oxidized skin lipids and the iron in hemoglobin.
The Color of Blood:
Blood gets its red color when oxygenated due to the buildup of protein known as Hemoglobin which contains iron.
Even though through our veins the color of our blood appears to be blue it is in fact always red. Blood in our veins has little oxygen and is a darker red that looks blue when covered by your skin.
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