Water is an essential component of our daily life. Water covers around 71% of the Earth's surface, while the ocean contain approximately 96.5 percent of all water on the planet. Let's take a look on something more familiar with us. What about with our body? Is there any water in our body? YES, of course. Our body contains a lot of water too. Water plays many important roles in body. The human body made of 55-60% of water. Not just blood contains water, both brain and heart of an adult are mostly 75% composed of water. Lungs contain 83% of water and even appearingly dry human bones contain 31% water. This essay begins by discussing about how important water is for our health an how to maintain our health with it. Click this one :