Which are water's biological functions?

Expert Answers
marilynn07 eNotes educator| Certified Educator

Liquid water is essential for life.

75% of the human body is made up of water.

The main functions of water in living systems are as an effective biological solvent, a reactant molecule in many biological reactions,  a temperature regulator, and a pH buffering agent.

Water, without any doubt, must be considered an integral part of biological macromolecules. The living world should be thought of as an equal partnership between proteins, nucleic acids and water.

giorgiana1976 | Student

Photosynthesis, cellular respiration are biochemical reactions which could not be happening without the presence of water.

The proper temperature for a normal functioning of an organism is assured by the water.

The transport of substances from cells to tissues is , once again, realised by the water.

Water si a good solvent for polar substances and assures the existence of enzymatic activity.

ronald75 | Student

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80% of human body is of water, water in biosystems enables biological functions.We're dependent on the day-to-day availability of fresh, clean water. We lose water through perspiration, urination and by exhalation—we breathe out water vapor. A typical woman needs about 2.7 liters (0.7 U.S. gallons) of water per day. A typical man needs about 3.7 liters (one U.S. gallon) per day.