The Functions of the Skeletal System

The skeletal system is one of the most important systems in the human body. Please view the following video and answer the following questions.


  1. What does the skeletal system include?
  2. Name the 4 functions of the skeletal system.
  3. What could happen if we did not have a skull?
  4. The bones of the skeletal system are stronger than ___.

Read more about the four functions of the skeletal system below:

Protecting Internal Organs

Below are two examples of how our bones protect our internal organs. The skull is critical in protecting our brain and the vertebral column is very important in the protection of our spinal cord. There are many other examples such as our ribs protecting our lungs and our sternum protecting our heart.

Skull Vertebrae

Photo Credit: Flickr CC courtesy of greenflames09


Providing a Framework for Posture and Movement

Our function of our skeleton is to provide a framework for our muscles. Every muscle in our body attaches to bone. Without bones, we would not be able to stand upright or move.


Photo Credit: Wikimedia CC

Storing Necessary Minerals

Bones act as reserves for necessary minerals in our bodies. Two of the most important minerals stored in bone are calcium and phosphorus. Calcium is required for proper enzyme, nervous system, and muscle functioning. Phosphorus is important in the rhythmic beating of the heart and in muscle contraction.

Producing Blood Cells

Did you know that bone marrow produces over 500 billion blood cells per day? Bone marrow is the flexible tissue found inside bones. Our red blood cells are produced in the ends of our long bones. Click on the image below to read more about the formation of blood cells:

Red Blood Cell

Photo Credit: Wikimedia CC


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