Percentage water human body 90? 70? 53?

In summary, the average percentage of water in the human body is approximately 60%, although this can vary. This myth likely stems from the fact that infants have a higher percentage of water in their bodies. If the percentage of water in the human body drops below 70%, it can lead to mild dehydration. The average person can survive without water for about 3-4 days, and the percentage of water in the human body is higher than most other living organisms.
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Superposed_Cat
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Hi, every time I hear any website/TV program/person mention the percentage water composition of the human body it varies tremendously. 90,80,85,70,53. What is it? any help appreciated. Thanks
 
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My Human Physiology book says that the 70-kilogram (154 pounds) reference man has 60% of his total body weight in the form of water (42 kg or 92.4 pounds). For women, it's a bit less because women have more adipose tissue (fat). Infants have more and old people have less water.

About two thirds of the water is in the cells, and the remaining third is split between interstitial fluid (75%) and the (blood) plasma (25%).
 
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Thanks
 

1. What is the percentage of water in the human body?

The average percentage of water in the human body is approximately 60%. However, this can vary depending on factors such as age, gender, and body composition.

2. Is it true that the human body is 90% water?

No, the human body is not 90% water. As mentioned earlier, the average percentage of water in the human body is around 60%. This myth likely stems from the fact that infants have a higher percentage of water in their bodies, which can be as high as 75%.

3. What happens if the percentage of water in the human body drops below 70%?

If the percentage of water in the human body drops below 70%, it can lead to mild dehydration. Symptoms of dehydration include thirst, dry mouth, fatigue, and dizziness. It is important to drink enough water and stay hydrated to avoid these symptoms.

4. Is it true that a person can survive without water for 53 days?

No, it is not true. The average person can survive without water for about 3-4 days, depending on factors such as climate and physical activity. A person's body will start to shut down and experience severe dehydration if they go without water for too long.

5. How does the percentage of water in the human body compare to other living organisms?

The percentage of water in the human body is higher than most other living organisms. For example, plants have a lower percentage of water, usually around 80-90%, while animals have a higher percentage, typically around 70%. However, there are some organisms, such as jellyfish and sea cucumbers, that have a higher percentage of water in their bodies than humans.

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