In the last few modules you saw pictures of healthy hearts and blood vessels,  and you learned a lot about how the cardiovascular system works.

Now that you know almost all you need to know about your heart and blood vessels, we are going to see what happens when things go wrong.

Click the "next" button below to learn about the unhealthy heart.
 

[graphic on right adapted from: www.tmc.edu/thi/ - The Texas Heart Institute]