Axial skeleton

Definition

The axial skeleton is the central core of the human skeleton, consisting of 80 bones. It includes the skull, vertebral column, and thoracic cage, providing support and protection for the brain, spinal cord, and vital organs.

5 Must Know Facts For Your Next Test

1. The axial skeleton consists of three main parts: the skull, vertebral column, and thoracic cage.
2. It has a total of 80 bones.
3. The skull protects the brain and supports sensory structures such as eyes and ears.
4. The vertebral column allows for flexible movement while protecting the spinal cord.
5. The thoracic cage includes the ribs and sternum, which protect vital organs like the heart and lungs.

Review Questions

• What are the three main components of the axial skeleton?
• How many bones make up the axial skeleton?
• Which part of the axial skeleton protects vital organs such as the heart and lungs?

Related terms

appendicularSkeleton: The part of the skeleton that includes limbs and girdles facilitating movement.

vertebrae: Individual bones forming the vertebral column that encase and protect the spinal cord.

thoracicCage: Structure formed by ribs and sternum that protects organs in the thorax.