6. The arteries open into the capillaries. Capillaries make a network around each cell of the body.
7. Some of the liquid parts of the blood go out through the sides of the capillaries and become food for the cells of the body.
8. From the capillaries the blood flows into the veins and back to the heart.
9. Bleeding can be stopped by holding the cut tightly between the hands.
10. The white blood cells grow into the sides of cuts, and so heal them. They also guard the body against the seeds of many diseases.
11. The red blood cells carry air to the cells of the body.
12. Alcohol weakens the heart and arteries.
13. Tobacco harms the heart.