LIFE SCIENCE

Detailed explanation-1: -Water is the most abundant molecule in cells, accounting for 70% or more of total cell mass. Consequently, the interactions between water and the other constituents of cells are of central importance in biological chemistry.

Detailed explanation-2: -Up to 60% of the human adult body is water. According to Mitchell and others (1945), the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.

Detailed explanation-3: -Fast facts on water weight: Water normally makes up 50 to 60 percent of an adult’s total body weight.

Detailed explanation-4: -Most of the human body is water, with an average of roughly 60%. The amount of water in the body changes slightly with age, sex, and hydration levels. While the average percentage of water in a person’s body is around 60%, the percentage can vary from roughly 45–75%.