Question:
The human body consists of _________ water by weight.
- 10 – 20%
- 30 – 50%
- 50 – 70%
- 5 – 10%
Detailed Explanation:
Understanding the water content in the human body is vital to comprehend how physiological processes are supported. Water is the most abundant component in the human body and performs several essential functions:
- Acts as a universal solvent for biochemical reactions
- Helps transport nutrients and waste products
- Regulates body temperature
- Provides structural integrity to cells and tissues
Water Percentage by Population:
- Infants: 75% – 78% (Highest due to less fat and more fluid)
- Adult males: 60% – 65%
- Adult females: 55% – 60% (Generally lower due to higher fat composition)
- Elderly: 50% – 55% (Decreases with age)
Conclusion: The human body consists of approximately 50% to 70% water by weight.
This range accounts for variations in age, sex, muscle-to-fat ratio, and health status, making it the most accurate general estimate.
Note: Hydration is essential to maintaining this balance and supporting the body’s biochemical and physiological functions.