American Academy of Professional Coders (AAPC) Practice Exam

How many classifications of bones are there?

1. Five

2. Seven

3. Nine

4. Ten

The correct answer is: Seven

The classification of bones is fundamental in anatomy and is typically grouped into four primary categories based on their shape and function: long, short, flat, and irregular bones. However, there are also subcategories and additional classifications based on specific characteristics, which can include features such as sesamoid and accessory bones. In terms of the classification of bones, five main types are often recognized in a more comprehensive study, which includes: 1. Long Bones 2. Short Bones 3. Flat Bones 4. Irregular Bones 5. Sesamoid Bones (which are embedded in tendons) The classification system can vary slightly depending on the source and context; however, the recognition of five main types is widely accepted in most educational materials and anatomy references. Thus, while the answer indicating seven classifications might include more specific subtypes beyond the primary categories, the standard grouping centers around five basic classifications. Understanding the categories aids in identifying the structure and function of bones in various medical and anatomical contexts.