|Vein has been listed as a level-4 vital article in Science. If you can improve it, please do. This article has been rated as C-Class.|
|This article is of interest to the following WikiProjects:|
||It is requested that an image or photograph be included in this article to improve its quality.
The Free Image Search Tool may be able to locate suitable images on Flickr and other web sites.
Translation into Chinese Wikipedia
There seems to be some confusion about the color of veins here. The blood within veins is definitely dark blue, and the bluish color one sees is due to the way light scatters through the skin. I'm not 100% confident on the exact particulars of this phenomenon - this article covers it nicely, but I'm not expert enough to properly incorporate it here. In the meantime, I've reverted this section back to what looks like the most accurate state (it was erased some time ago, but it shouldn't have been...). Samworf (talk) 06:21, 4 June 2008 (UTC)
My veins don't look blue at all. They always looked green. Is it just blue for Anglo or northern European types, but not say, Mediterranean? Also, what colour is the vein vessel itself, empty of blood and outside of the body? 220.127.116.11 (talk) 07:19, 30 November 2008 (UTC)
Here's a good lay description for the blue/green appearance of veins. Note that it does not mention subcutaneous fat, but describes the color as a function of how light interacts with skin and blood, and throws in some psychological factors of color perception. It also stresses that the color is NOT due to the oxygen saturation of venous blood, a common misconception. SteveChervitzTrutane (talk) 08:33, 28 April 2009 (UTC)
- Anthis, Nick (2008-04-17). "Why Are Veins Blue?". ScienceBlogs.com. Retrieved 2009-04-28 I agree! Blood is NEVER BLUE! Even though we look at the veins on our arms and they LOOK blue, they are not. It is just simply the way that light reflects and bounces off the skin, that it gives the illusion that our blood/blood veins are blue. Information from: MY SCIENCE TEACHER!.
I'm glad this article specifically mentions the falseness of blue blood. That misconception always irritates me. I even saw a show on one of the discovery channels where the host mentioned the "blue deoxygenated blood returning" through veins. Gah! 18.104.22.168 (talk) 19:43, 15 May 2009 (UTC)
"Standing or sitting for a prolonged period of time can cause low venous return from venous pooling vascular shock."
Didn't flow or make sense, edited to:
Standing or sitting for a prolonged period of time can cause low venous return from venous pooling (vascular) shock.
Inherent Ventricular Assist Venous_valve?
Thanks for the insight.
Does natural contraction of skeletal muscle "massage" the vein and through the one-way mechanism of the venous valve then assist the heart?
Could a pace maker applied to skeletal muscle tissue wrapped around the largest veins provide ventricular assistance? In fact, could it continue circulation should the heart fail thus allow time for treatment and recuperation?
If a person could have a supplementary heart(s), which veins would be the best candidates?