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Blood, Veins, And Arteries Essay

563 words - 3 pages

Blood, Veins, and Arteries
In what way are veins really blue?
People’s skin tone distorts vein color, as it absorbs blue light. “Subcutaneous fat only allows blue light to penetrate skin all the way to veins, so this is the color that is reflected back. Less energetic, warmer colors are absorbed by skin before they can travel that far” (Helmenstine). In other words, the skin filtrates light wavelengths differently and blue and red light have different wavelengths. Not only that, but veins appearing blue has to do with the way the eyes and brain interprets the information. The brain compares the dark red color of blood to the warm color of skin, making the veins seem blue or green-blue.

In what way are veins not really blue?
Veins seem blue-colored due to ...view middle of the document...

Hemoglobin that contains oxygen has a bright red color and hemoglobin that lacks oxygen is dark red.

Why is representing veins as blue a good analogy for what a vein really is?
Veins bring deoxygenated blood from different areas of the body to the heart, and deoxygenated blood is not wanted, and since blue is almost the opposite color of red, it is a good analogy.

Why is red a good analogy for a healthy artery?
Red is a good analogy for a healthy artery because healthy arteries should be a bright red color. A bright red color means that the blood running through the artery contains oxygen which is vital for bodily functions.

Why is a dark color (like black) a good analogy for a bad artery?
A dark color, such as black, is a good analogy for a bad artery because of what dark red blood indicates- a lack of oxygen. A lack of oxygen means that the blood received carbon dioxide, which is what the human body is trying to get rid of, showing that this blood is not healthy or good for the body.

Works Cited
Davis, Charles Patrick, MD, PhD. “Hemoglobin (Levels): Learn About Value Ranges.” EMedicineHealth. Ed. Melissa Conrad Stöppler. WebMD, Inc., n.d. Web. 07 Dec. 2015.
Helmenstine, Anne Marie, Ph.D. “Is Deoxygenated Human Blood Blue?” Education. N.p., n.d. Web. 07 Dec. 2015.
Hiskey, Daven. “De-oxygenated Blood Turns Dark Red, Not Blue.” Today I Found Out. N.p., 03 Sept. 2010. Web. 07 Dec. 2015.
Kruszelnicki, Karl S. “Why Do Veins Look Blue?” ABC Science, 04 Nov. 2014. Web. 07 Dec. 2015.
"Major Differences." Difference between Artery and Vein. Major Differences, n.d. Web. 08 Dec. 2015.

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