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Questions tagged [blood]

A fluid which delivers substances to various cells within an organism's body. The most common fucntion are the delivery of nutrients and the transportation of waste products. Composition varies widely across species.

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Does the Red Cross sell $2.1 billion worth of blood annually?

This recent image on cracked.com claims that the Red Cross grosses USD 2.1 billion a year from selling blood. It also claims that the Red Cross is a business which sells donated blood for $400 a pint. ...
March Ho's user avatar
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Is deoxygenated blood blue?

I have encountered many people in my life that believe that your blood is blue until it hits the air and only then it turns red. The blue color of our veins is also explained the same way, as the ...
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