How do veins differ from arteries

Veins carry deoxygenated blood (oxygen poor blood) from other parts of the body to the heart while arteries carry oxygenated blood (oxygen rich blood) away from the heart to other parts of the body.

Explanation: Arteries carry oxygenated blood with the exception of pulmonary artery while veins carry oxygen poor blood with the exception of pulmonary vein.

Arteries carry blood away from the heart while veins carry blood towards the heart.

Arteries have thick, elastic, mucscular walls while veins have thin, less elastic walls.

Arteries have smaller holes inside through which blood passes while veins have wider holes.

Blood flows through the arteries at high pressure while blood flows through the veins at low pressure.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

i think its through the fallopian tube