Welcome to the module on respiration.

Things to note! 
1. The substances needed for respiration.  
2. The products of respiration. 
3. Where the products of respiration come from.  
4. The equation for respiration.  
5. What happens to the products produced in respiration.  
6. The differences between respiration and photosynthesis.  
7. The factors that affect respiration when the body is exercising.