What happens to food when it enters the small intestine?   

Which organ system cleans the body by removing wastes?   

Why is exercise important for our body?  

How is the skeletal system important to us?

Describe the process of digestion.

Explain inhalation and exhalation.  

How is blood transported inside the body?  

The skin is a sense organ but also belongs to the excretory system. (Yes/No)
Give reasons to support your answer.