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Biology/Blood color

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Expert: - 8/21/2011


Question
Can human blood be blue? Or it always stay red.

Answer
Human blood is red despite stories that is blue until strikes the air. Blood drawn into a vacuum tube is red. Venous blood is a darker red then arterial blood.
Actually blood in the body has no color since color comes from reflected light rays and blood in the body is not exposed to light rays. When it is exposed to light all wave lengths are absorbed expect red

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Walter Hintz

Expertise

Science teacher for over 50 years. MSc. in biology. I can answer questions in general biology, zoology, botany, anatomy and physiology and biochemistry.

Experience

I have a MSc in biology and have been a science teacher for over 50 years. At present I am a faculty member at a college and a science consultant at seven catholic schools.

Publications
The Ohio journal of Science
Momentum-The Journal of the Catholic Education Association

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