It is a vein and it carries the blood back to the heart through the vena cavas so the blood can be reoxygenated
Cellular Resperation = C6H12O6 + 6O2 → 6CO2 + 6H2O.
Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O
They can be spread around to make sure they can grow. Plants reproduce sexually not asexually they can also spread their seeds using insects.
The cell is the most basic unit of life.
Answer: An isotonic solution is a solution in which the amount of dissolved material is equal both inside and outside of the cell. Water still flows in both directions, but an equal amount enters and leaves the cell.
hope i was able to help.