Answer: if to much water the roots die if to less cant get oxygen
Explanation:
so much water is in the soil of the plant, roots will die, and the plant cannot get enough soil oxygen. If a plant does not have enough water, it can't move through the plant with the requisite nutrients. If a plant does not have good roots, it cannot grow, and so the correct water balance is important for growing plants.
Basically the main function of both of these has to do with blood. Arteries are important because they move blood away from the heart. Veins do the opposite of arteries and actually return blood back to the heart! They are both very important for the body.
Increased consumption of lutein & zeaxanthin increases phytochemicals that are associated with a lower incidence and slower progression of age-related macular degeneration.