Around ...% of body weight in adult human is contributed by muscles.

Options

A. `40%`
B. `20%`
C. `16%`
D. `15%`

Answer

To determine the percentage of body weight in an adult human that is contributed by muscles, we can follow these steps:

### Step 1: Understand the Composition of Human Body
The human body is made up of various components, including muscles, bones, fat, and organs. Among these, muscles play a significant role in body weight.

### Step 2: Identify Muscle Types
Muscles in the human body can be categorized into three types:
- **Voluntary Muscles**: Muscles that can be controlled consciously (e.g., skeletal muscles).
- **Involuntary Muscles**: Muscles that function automatically (e.g., smooth muscles).
- **Cardiac Muscles**: Muscles found in the heart.

### Step 3: Estimate Muscle Contribution to Body Weight
Research and studies indicate that muscles constitute approximately 40% of an adult human's body weight. This percentage can vary slightly based on factors like age, sex, and fitness level, but 40% is a widely accepted average.

### Step 4: Evaluate the Options
Given the options:
- 40%
- 20%
- 16%
- 15%

The option that aligns with the estimated contribution of muscles to body weight is **40%**.

### Step 5: Conclusion
Thus, the correct answer to the question is that around **40%** of body weight in an adult human is contributed by muscles.

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