Which of the following is not considered an organ system in the human body?

• A. Stem system
• B. Circulatory system
• C. Nervous system
• D. Skeletal system

Answer: (A)

Verified step by step guidance

1. Understand the definition of an organ system: An organ system is a group of organs that work together to perform one or more functions in the body.
2. Review the list of options provided: Circulatory system, Nervous system, Skeletal system, and Stem system.
3. Identify the known organ systems: The Circulatory system, Nervous system, and Skeletal system are all recognized organ systems in the human body.
4. Consider the term 'Stem system': This term does not correspond to any recognized organ system in human anatomy.
5. Conclude that 'Stem system' is not considered an organ system in the human body, as it does not fit the definition or match any known systems.