How are pulmonary viens different from all other viens in the body?

It carries blood that has no oxygen from the heart to the lungs to pick up oxygen all the others carry oxygenated blood with the exception of unbilical arteries. The pulmonary artery also exchanges...

because it is the only bone not artuculated to any other bone.

This may sound confusing, but bear with me. The heart has 2 sides, each with 2 chambers. The top chambers are the atriums, the bottom chambers are the ventricles. Both sides contract, or beat at...

because it carries oxygenated blood to the heart. all other arteries carry oxygenated blood away from the heart.

It is the only vein that carries OXYGENATED blood back to the left atrium to be sent to the rest of the body.