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Animals with a bony skeleton are called vertebrates and humans belong to this group. The skeleton protects, supports and allows movement

 

Human skeleton

 

Bones give bodies their shape and muscles attached to the skeleton work in pairs to create movement.

 

Arm muscles

 

Digested food and oxygen are pumped through our circulatory system by the heart to all parts of the body.

 

The healthy functioning of these organs can be affected by drugs, diet and exercise.

 

Human circulatory system

 

Use this worksheet to help your understanding of the relationship between the normal functioning of the body systems and what can affect or change it.

10 questions