Certified Rehabilitation Counselor 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 1070

How many systems does the human body have?

10

12

13

The human body is commonly understood to be composed of 11 major organ systems. These systems include the integumentary, skeletal, muscular, nervous, endocrine, cardiovascular, lymphatic (or immune), respiratory, digestive, urinary, and reproductive systems. The concept of 13 systems does not have widespread support in medical education or literature.

Some frameworks may incorporate sub-systems or divisions of the nervous and endocrine systems, which can lead to a different count, but the generally accepted count among most health and biological sciences remains 11. Thus, while 12 systems might suggest a combination of certain parts, 13 is not widely accepted or recognized in traditional educational contexts.

A thorough understanding of these systems is essential for those studying rehabilitation counseling, as knowledge of human anatomy and physiology informs practice when working with individuals with disabilities or health challenges.

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