MCQ
Which two body systems most directly cause the arm to bend?
  • Skeletal and muscular.
  • B
    Reproductive and circulatory.
  • C
    Respiratory and excretory.
  • D
    Nervous and digestive.

Answer

Correct option: A.
Skeletal and muscular.
Skeletal and muscular system allow a human arm to bend and move.

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