BLOOD: CIRCULATORY SYSTEM III

Our blood contains three types of cells:

1. Red blood cells absorb oxygen in the lungs and transport it to the organs and muscles.
2. White blood cells fight germs and infections in our body. They attack infected cells.
3. Platelets help to stop bleeding. When you have a cut that's bleeding, platelets stick to the edges of the cut and to each other. In this way, they cover the cut and form a scab, and this stops the bleeding.