FTCE Physical Education K-12 Test 2025 – 400 Free Practice Questions to Pass the Exam

The correct choice reflects that approximately 55% to 75% of the human body is composed of water, which is a fundamental aspect of human biology. This percentage can vary based on several factors, including age, sex, and body composition. For instance, infants have a higher percentage of body water—around 75 to 78%—compared to adults, who typically range from 50 to 65%.

Water plays a crucial role in maintaining bodily functions, including temperature regulation, nutrient transport, and waste removal. It is essential for metabolic processes, aids in digestion, and acts as a lubricant for joints.

Other percentages listed in the alternatives do not accurately reflect the scientific understanding of body composition concerning water content. For instance, lower percentages suggest inadequate hydration levels, while excessively high values would be physiologically impossible. Understanding this concept is vital in physical education, as it underscores the importance of hydration in performance and health.