Anatomy & Physiology Musculoskeletal #4


Which is an example of a flat bone for the human body?


  1. Femur
    • Rationale:

      The femur is a long, not flat, bone, of the lower extremities.

  2. Coccyx
    • Rationale:

      The coccyx is an irregular, not flat, bone.

  3. Humerus
    • Rationale:

      The humerus is a long, not flat, bone of the upper extremities.

  4. Sternum
    • Rationale:

      The sternum is a flat bone that is commonly referred to as the breast bone. As part of the bony thoracic wall, the sternum helps protect the internal thoracic viscera, including the esophagus, heart, and lungs.


The skeletal bones can be categorized and classified in several ways.


Learning Outcomes

There are three primary types of bones in the skeletal system. These bones include the flat bones, the long bones, and the irregular bones. Flat bones are made up of two layers of compact bone and a single layer of spongy bone. They have a flat, not rounded, shape. While flat bones have bone marrow, they do not contain a marrow cavity. Examples include the rib bones, the sternum, and the skull.

Test Taking Tip

Consider the different types of bones when determining the correct choice for this question.

Video Rationale