American Academy of Professional Coders (AAPC) Practice Exam

Which classification includes long bones?

1. Flat bones

2. Short bones

3. Tubular bones

4. Cuboidal bones

The correct answer is: Tubular bones

Long bones are classified as tubular bones due to their elongated shape and structure. These bones have a central medullary cavity and are characterized by a diaphysis (shaft) and epiphyses (ends). They play critical roles in movement, support, and the production of blood cells in the bone marrow. Examples of long bones include the femur, humerus, and tibia. The other classifications, such as flat bones, short bones, and cuboidal bones, refer to different shapes and functions. Flat bones, for instance, are typically thin and flat, providing protection and broad surfaces for muscle attachment, while short bones have a somewhat cube-like shape and primarily facilitate stability and support. Cuboidal bones is not a commonly recognized classification in medical terminology. Thus, the best fit for long bones is tubular bones.