Question

A vast proportion of our body's weight is made up of}

• A. bones
• B. water
• C. organs
• D. skin, tissues and organs

Hint:

Remember: In an average healthy adult, water constitutes about 60% of body weight. This percentage is higher in infants ($\sim$75%) and lower in elderly individuals ($\sim$50–55%).

Answer 1

The Correct Option is B

Concept: The human body is composed of various elements and compounds. Water is the most abundant substance by weight in the human body, playing a critical role in cellular functions, temperature regulation, nutrient transport, and waste removal. Step 1:Understanding body composition by weight.}
The average adult human body consists of:

• Water: 50–70% of total body weight
• Proteins: 15–20%
• Fats: 10–30% (varies by individual)
• Minerals (including bones): 5–10%
• Carbohydrates: 1–2%

Thus, water constitutes the vast proportion of body weight.
Step 2:Evaluating each option.}

• Bones: Account for approximately 15% of body weight. Not the largest proportion.
• Water: Accounts for 50–70% (average ~60%). This is the largest proportion.
• Organs: Organs such as heart, liver, brain, etc., collectively make up less than water by weight.
• Skin, tissues and organs: This is a broader category but still less than water in total weight percentage.

Therefore, water is the correct answer.
Step 3:Conclusion.}
Since water makes up the majority (over half) of human body weight, option (B) is correct.