Arm

This article is about the anatomical structure. For other uses, see Arm (disambiguation). In anatomy, an arm is one of the upper limbs of a two-legged animal. The term arm can also be used for analogous structures, such as one of the paired upper limbs of a four-legged animal, or the tentacles of an octopus. Anatomically, the term arm refers specifically to the segment between the shoulder and the elbow. The segment between the elbow and wrist is the forearm. However, in colloquial speech ...