Arms
Arms
Arms (pronunciation: /ɑːrmz/) are the upper limbs of the human body, extending from the shoulder to the hand.
Etymology
The term "arm" comes from the Old English word "earm," which is akin to the Old High German "aram," both meaning "poor, miserable."
Anatomy
The arm is made up of three segments: the upper arm, which extends from the shoulder to the elbow; the forearm, which extends from the elbow to the wrist; and the hand, which is attached to the forearm at the wrist.
The upper arm contains one bone, the humerus. The forearm contains two bones, the radius and the ulna. The hand contains 27 bones, including the carpals, metacarpals, and phalanges.
Function
Arms are primarily used for physical manipulation, allowing humans to interact with their environment by reaching for, touching, and manipulating objects. They also play a crucial role in body language and non-verbal communication.
Related Terms
- Elbow: The joint that connects the upper arm to the forearm.
- Wrist: The joint that connects the forearm to the hand.
- Shoulder: The joint that connects the arm to the torso.
- Humerus: The bone of the upper arm.
- Radius: One of the two bones of the forearm.
- Ulna: One of the two bones of the forearm.
- Carpals: The eight small bones that make up the wrist.
- Metacarpals: The five bones that make up the palm of the hand.
- Phalanges: The 14 bones that make up the fingers.
External links
- Medical encyclopedia article on Arms
- Wikipedia's article - Arms
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