So you can make the world greener
8. Arteries carry oxygenated blood from the heart to the rest of the body, while veins carry deoxygenated blood from the body, back to the heart. Arteries are thick and muscular, while veins aren't as thick, and they have valves.
Water freezes at 0°C, the lowest possible temp for any material is absolute zero and also most of these u can just google good luck!
False both the sun and the stars change and move around.
