Which of the following bones is classified as long bone?

The clavicle is classified as a long bone because it has an elongated shape and is longer than it is wide. Long bones are typically characterized by a shaft, or diaphysis, that is cylindrical and are primarily responsible for supporting the weight of the body and facilitating movement. The clavicle, or collarbone, connects the arm to the body and plays a crucial role in the anatomy of the shoulder. This bone allows for a wide range of motion of the upper limbs and provides structural support.

In contrast, the patella is classified as a sesamoid bone, which is a type of short bone that develops within a tendon and helps protect it. The phalanges, while they may appear long, are categorized as short bones because they are shorter relative to their width and are part of the digits, working more for dexterity. The scapula is classified as a flat bone, which provides an area for muscle attachment and helps protect the underlying organs while facilitating the full range of motion in the arm.