Major Parts of the Skeletal System

In the human body, several different systems work together to support life and function. One of the most important of these is the skeletal system. This collection of bones enables the body to function in the physical world, allowing movement and protecting other organs from damage.

Skull

The skull is not one bone, but is made up of several connected bone plates. The bones of the skull protect the brain from trauma and injury.

Ribs

Twelve pairs of rib bones wrap around the body to protect organs such as the heart and the lungs.

Humerus

The humerus is the main bone found in the upper arm. This bone allows the body to push and pull objects.

Radius and Ulna

The forearm, or lower arm, contains two major bones, the radius and ulna. These are parallel to each other and aid in mobility and arm movements.

Spine

The spine is composed of 26 individual bones, called vertebrae. These bones work together to support the back and protect the spinal cord from injury.

Pelvis and Leg Bones

The bones of the pelvis serve as a solid connection point for the joints of the legs. In the leg, the femur--or thigh bone--connects to the lower fibula and tibia bones. These bones are the largest in the body, supporting both weight and movement.

References

• Skeletal System

Resources

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