At high temperatures, water forms steam or vapor - a gas. A frozen pond warming in the winter sun may show all three phases at once. Solid ice floating on the lake surface, liquid water below, and rising steam where the sun warms the melting ice. A water molecule has two atoms of hydrogen and one atom of oxygen. Forming the link to life.
Liquid water accounts for two-thirds of our body weight.
Water helps blood and its components transport oxygen and nutrients and remove waste products through our circulatory system. Each time we exhale, water vapor leaves our bodies. Most fishes and other aquatic creatures can only live when completed covered with water. Some land animals, like amphibians, lay eggs in water. Others, like the desert kangaroo rat, seldom drank water but survive by eating seeds, plants, and metabolizing fat to produce water.