The Sun is a major source of energy for most ecosystems and organisms.
Bonjour,
1. Arteries carry blood from the heart to the rest of the body, whereas veins carry blood from the rest of the body back to the heart.
2. Almost all arteries carry oxygenated blood and almost all veins carry deoxygenated blood.
3. Arteries have a thick elastic muscle layer, whereas the muscle layer for veins is much thinner.
The primary source of energy that drives convection within the atmosphere and oceans is the sun.
True it holds everything thats in the cell membrane without damaging anything or cutting off