Which system enables movement, maintains posture, aids in breathing, and facilitates blood and food circulation?

Which system enables movement, maintains posture, aids in breathing, and facilitates blood and food circulation?

• A. Muscular System
• B. Skeletal System
• C. Nervous System
• D. Circulatory System

Answer: (A)

Movement comes from muscles contracting and pulling on bones, which also lets us maintain posture. Breathing relies on muscles like the diaphragm and rib muscles to expand and contract the chest. Muscles also help move substances through the body—heart muscle pumps blood, and smooth muscles push food through the digestive tract. Because these actions are all driven by the muscles, the muscular system best fits all four functions.

Movement comes from muscles contracting and pulling on bones, which also lets us maintain posture. Breathing relies on muscles like the diaphragm and rib muscles to expand and contract the chest. Muscles also help move substances through the body—heart muscle pumps blood, and smooth muscles push food through the digestive tract. Because these actions are all driven by the muscles, the muscular system best fits all four functions.