What percent of the human body consists of water?

Question

What percent of the human body consists of water?

A. 60%
B. 70%
C. 80%
D. 90%

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Correct Answer

Answer: A. 60%

An average adult human body is made up of about 60% water. The exact amount can vary from person to person. Children usually have a higher percentage of water in their bodies than adults.

Water is very important because almost every part of our body needs it to work properly.


 

Let's Understand

Think about your body as a busy city. A city needs water for many jobs, and your body does too.

Water helps your body:

  • Carry nutrients to different parts of the body.

  • Help remove waste from the body.

  • Keep your body temperature at a healthy level.

  • Keep your joints moving smoothly.

  • Help your brain and other organs work properly.

  • Support digestion and other important body functions.

Water is found in many parts of your body, including your blood, muscles, brain, and other organs.

Your body is constantly losing some water when you breathe, sweat, and go to the bathroom. That is why drinking enough fluids is important.

Does Everyone Have the Same Amount of Water?

No. The percentage of water in the body is different for different people.

It can depend on:

  • Age

  • Amount of muscle

  • Amount of body fat

  • Overall body size

For example, babies and young children generally have a higher percentage of water than adults.

Did You Know?

  • Lungs: About 83% water, Kidneys: About 79% water, Brain and heart: About 73% water, Bones: About 31% water. Read this for more details.

  • Blood contains a lot of water, which helps it carry substances around the body.

  • Children generally have a higher percentage of body water than adults.

  • Your body loses water every day through breathing, sweating, and urination, so you need to replace it regularly.

Think About It

If your body is about 60% water, where do you think all that water is stored in your body?

Quick Recap 
What We Learned Simple Explanation
Water in the human body An average adult human body is about 60% water.
Why water is important Water helps the body carry nutrients, remove waste, control temperature, and perform many other functions.
Is the percentage the same for everyone? No. It varies with age, body composition, and other factors.
Children and adults Children generally have a higher percentage of body water than adults.
 



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