Why is blood red but veins are blue? also why is art important

because  light has to penetrate  the skin to illuminate them, blue and red light  being of different wavelength  penetrate with different degree of success .the oxygen rich blood is then pumped out to  your body through your  arteries .its  bright red at this point.

Explanation:

hello! my name is zalgo and i am here to be of assistance for you today! in most cases, it takes a while for little babies to learn things, but visual presentation (showing them what do to), some physical therapy (if you have seen funny videos on the internet of parents beating things to show the kids what not to do).

i hope that this ! : d

"stay and stay proud! " - zalgo

the gravitational force on an object increase as the mass of an object also, im not going to report you, but this question should be under the science category, not health