By: Ola AzzouqaUSGS, water covers about 71 percent of the Earth's surface. Water also exists in the air as vapour. Thanks to the water cycle, our planet's water supply is constantly moving from one place to another and from one form to another.
Freshwater is necessary for the survival of all living beings on Earth. All oxygen-dependent organisms need water for the respiration process. Some beings, such as fish, cannot breathe outside water. Plants need water to grow as it activates the process of germination, it also softens the seed making it easier for the plant to break through by transporting important nutrients through the plant.
Humans as well need water to survive. Without water, the human body would stop functioning properly. A person can't survive for more than a few days without water as the human body has lots of important jobs and it needs water to do many of them.
Up to 65% of the adult body is water; the brain and heart are composed of 73% water, the lungs are about 83% water, the skin contains 63% water, kidneys are 79%, and even the bones are 32%.
What are some of the benefits of drinking water?
Maintains body fluids balance
Maintains normal bowel function
Helps kidneys and the liver
Improves skin health and beauty
Controls calories and aids weight loss
How much should we drink water?
- For men, a total of 13 cups (about 3 litres) each day.
- For women, 9 cups (a little over 2 litres) each day. Pregnant women should drink about 10 cups of water daily. Those who breastfeed need about 12 cups
- If you exercise
- On a hot day
- When you are sick
- When you are tired
- If you take medications
- If you drink a lot of caffeine