Corpus: Arm

The arm is the free upper limb of the human body, encompassing not only the arm itself but also including the shoulder girdle.

The arm is structured into three primary sections:

• upper arm
• forearm
• hand, which further consists of:
  • carpus (wrist bones)
  • metacarpus (bones of the mid-hand)
  • fingers (phalanges)

The arm’s structure involves several bones:

• humerus (upper arm bone)
• ulna and radius (forearm bones)
• carpal bone (bones of the wrist, or ossa carpi)
• metacarpal bones (bones of the mid-hand, or ossa metacarpi)
• phalanges (bones of the fingers)

The human arm boasts the most extensive range of movement of any body part. Its functions are diverse, including serving as a tool for gripping and manipulation, as well as playing a crucial role in maintaining body balance. This versatility allows for a wide array of movements and activities, from fine motor skills to aiding in overall body equilibrium.

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