Figure 7 has two diagrams of arteries. In the top artery, there is text above it with ‘Normal blood flow’. Inside this artery, there are three arrows pointing to the right hand side, with red blood cells flowing through the artery. The second artery below has text above it with ‘Blood flow gets blocked’. Inside the artery there is yellow mass building up, and the red blood cells are being blocked by it. There is a yellow arrow in a circular motion, demonstrating how the red blood cells have to turn around and go back in the direction they came from.