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How many body systems are commonly recognized?

  1. 10

  2. 11

  3. 12

  4. 9

The correct answer is: 11

The commonly recognized number of body systems in human anatomy is 11. This classification is widely used in medical and educational contexts to categorize the various functionalities and structures within the human body. Each system has a specific role that contributes to maintaining homeostasis and overall health. The 11 body systems include the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic (or immune), respiratory, digestive, urinary, and reproductive systems. Understanding these systems is essential for estheticians, as many treatments and services can affect or relate to these systems, particularly in terms of skin health and overall aesthetics. The other options reflect incorrect counts of the body systems, as medical literature and educational resources consistently affirm the existence of 11 distinct systems in the human body.