Your body has a lot of water. Certainly, but how much exactly does this vital liquid represent? And how is this water distributed in the human body?
How much water is there in the human body? Answer to this question: it depends! The proportion decreases during life, from 80% of the fetus to 50% of the elderly. Between the two, the adult woman retains about 55% and a man rather 60%. And inside the body, the amount varies widely depending on the tissue.
Water is an essential element in life and it shows in the importance of this liquid in the composition of human body.
The average quantity of water contained in an adult organism is indeed 65%, which corresponds to approximately 45 liters of water for a person of 70 kilograms. The total water content of the human body depends on several factors (body size, age in particular: more information in the CNRS file).
More specifically, almost 60% of the human body of an adult man consists of water, which corresponds to approximately 42 liters of water in a 70 kg person. Among women, due to the higher proportion adipose tissue, this rate is 55%.
At birth, this percentage even reaches 78% in babies!
Distribution of water in the human body
This water is not evenly distributed in the human body, some organs contain more than others:
- lungs: 78%;
- blood: 79%;
- brain: 76%;
- smooth muscles: 75%;
- bone : 22.5%;
- adipose tissue: 10%.
Every day, the human body eliminates 2.4 liters of water through respiration, sweat, urine … It is therefore necessary to replace this volume of water through drinking and feeding to avoid dehydration.
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