Which option is NOT listed as an animal body system?

Which option is NOT listed as an animal body system?

• A. Musculo-skeletal system
• B. Digestive system
• C. Skeletal system
• D. Nervous system

Answer: (C)

The main idea is how body systems are grouped. In many physiology outlines, bones and muscles are treated together as the musculoskeletal system because they work together for support and movement. The skeletal portion isn’t listed as a separate system in that framework; it’s considered part of the musculo-skeletal system. So, the option describing the skeletal system isn’t listed as its own system, making it the one that isn’t listed. Digestive and nervous systems are standard separate systems and are correctly listed.

The main idea is how body systems are grouped. In many physiology outlines, bones and muscles are treated together as the musculoskeletal system because they work together for support and movement. The skeletal portion isn’t listed as a separate system in that framework; it’s considered part of the musculo-skeletal system. So, the option describing the skeletal system isn’t listed as its own system, making it the one that isn’t listed. Digestive and nervous systems are standard separate systems and are correctly listed.