Question Video: Recalling the Components of the Axial Skeleton Biology

What are the components of the axial skeleton? [A] The pectoral and pelvic girdles and the bones of the arms and the legs. [B] The vertebral column, the limb bones, and the pectoral girdle. [C] The skull and the pelvic girdle. [D] The vertebral column, the skull, and the thoracic cage.

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Video Transcript

What are the components of the axial skeleton? (A) The pectoral and pelvic girdles and the bones of the arms and the legs. (B) The vertebral column, the limb bones, and the pectoral girdle. (C) The skull and the pelvic girdle. Or (D) the vertebral column, the skull, and the thoracic cage.

This question is about the skeletal system. And it’s asking us to recall the components or parts that are in the axial skeleton, which is a part of the skeletal system. The adult human skeletal system consists of 206 bones, as well as all of the joints that hold them together. The skeletal system is often divided and described in two sections: the axial skeleton and the appendicular skeleton.

The appendicular skeleton consists of the human appendages, which we call arms and legs. The appendicular skeleton also contains the bones that attach the appendages to the torso. And that includes our pelvic girdle, as well as the pectoral girdle. The axial skeleton contains the bones that fall along and around the central axis of the human body. This includes the bones of the skull, the bones of the thoracic cage, also called the rib cage, as well as the bones of the vertebral column, which we also call the spinal column. This means that the components of the axial skeleton are the vertebral column, the skull, and the thoracic cage.

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