On average, skeletal muscle comprises what percentage of total body weight?

Skeletal muscle typically makes up about 40% of total body weight in the average adult. This percentage can vary based on factors such as age, sex, and level of physical activity, but 40% is a widely accepted average for adults. Skeletal muscle is crucial for a variety of functions, including movement, posture, and metabolic regulation. This percentage reflects the body's composition and the significant role skeletal muscle plays in overall health and physical performance.

While the other options present lower estimates, they do not accurately represent the average contribution of skeletal muscle to body weight in a healthy individual. Thus, 40% stands as the most accurate representation of skeletal muscle mass within the context of overall body composition.