Arm

Definition

In the context of anatomy and physiology, particularly within the chapter on the appendicular skeleton, the arm refers to the region of the upper limb between the shoulder and the elbow. It is primarily composed of a single long bone, the humerus, which connects to muscles and joints enabling a wide range of motion.

Related terms

Humerus:

The long bone in the upper arm that extends from the shoulder to the elbow, serving as a pivotal structural component.

Elbow Joint:

A complex hinge joint formed where the humerus meets both the radius and ulna, allowing for bending and extending motions of the forearm.

Shoulder Girdle:

Comprises bones including scapula (shoulder blade) and clavicle (collarbone), connecting the upper limb to the axial skeleton and facilitating upper body mobility