Yes. Sorry i just saw your other reply and i'd already written in a reply by then.

Well, I have no idea if this question is expected in paper. But science is a subject which needs a conceptual understanding. There are many things in science which you need to understand the actual concept of. I asked the question about pulmonary vessels with the same thought. Thanks for your participation candidguy.

Thanks a lot for making my concept clear. Here is what I understand why these vessels have twisted names:

Generally arteries carry blood away from heart to all parts of body and veins carry blood from lungs to heart. But in case of pulmonary vessels the situation is reverse.

Deoxygenated blood enters heart's right auricle from upper and lower parts of body through veins and then it flows into right ventricle through a valve. When the ventricle contracts, the de-oxygenated blood is pumped out of heart to lungs for re-oxygenation. Pulmonary artery is an artery because it is a vessel coming from your heart.

Once the blood reaches lungs, it is reoxygenated and carried to heart through pulmonary vein. It opens into left auricle and then flows into left ventricle through a valve. Then, blood is pumped out of heart as the result of contraction of left ventricle and supplied to all parts of body. The pulmonary vein is a vein simply because it is a vessel returning to your heart.
So, both pulmonary artery and pulmonary should not be understood in terms of oxygenation status, but rather in terms of blood flow in relation to heart.

I have just viewed a flow diagram which further clarifies the matter. I knew about the said vessels in crude terms before the discussion.

Thanks for contributing to my knowledge Asad Shafiq.

Regards

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its very well explained by Mr.asad that oxygenated blood is not the criteria of being an artery...its the "taking away"...and "taking to" phenomen.....Pulmoneary artery takes pumped blood away from heart....hope i explained...

My dear, confusion lies in the definition of an artery and vein.. Actually an artery is a vessel that carries blood (whether oxygenated or deoxygenated) away from the heart and a vein is a vessel that carries blood back (whether oxygenated or deoxygenated) to the heart.. As pulmonary artery carries blood from heart thus it is called an artery, though it carries deoxygenated blood.. and the opposite is that with the pulmonary vein..
Hope the confusion is cleared now..
Regards..

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Moreover, blood is oxygenated somewhere; obviously in lungs, and it will be oxygenated if it is delivered to lungs plus pulled back to heart for circulation. Both of these functions are done by the pulmonary artery and vein. N consider the definition mentioned in above post.

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Fixed signs.

Thanks to both of you. I'm no more confused about the pulmonary vessels. I've also got the answer to my query under the following thread.
http://www.cssforum.com.pk/css-compu...nary-vein.html
Thanks for your participation too.

Regards

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Real richness is that you are so expensive that no one can buy your character.