上肢

1. Origins, structure, and basic meaning

• Structure: 上肢, read じょうし, is an anatomical noun for the upper limb extending from the shoulder through the hand.
• Basic usage: Upper limb fits anatomy, while arm may be a more natural rendering in an ordinary exercise description.

2. Common pitfalls and similar expressions

• Anatomical range
  • 上肢 covers the entire limb from shoulder to hand, not only the upper arm.
• Technical and everyday wording
  • Preserve the technical term when discussing bones, but ordinary movement instructions may call for the simpler word arm.