Welcome to the module on the Circulatory System.

Things to note! 
1. The parts of the circulatory system. 
2. The functions of the blood and what blood contains. 
3. The functions of the parts of blood.  
4. The function of the heart and how it interacts with the other body systems. 
5. The structures of the heart. 
6. Directions of blood flow around the body. 
7. How exercise effects the heart. 
8. What a pulse is and how to measure it. 
9. That certain factors can affect the workings of the heart.