Blood is very important, it is the medium for which the majority of transportation occurs in our bodies, it carries the necessary species to fight disease, blood also helps in keeping a constant temperature in the body.

This website gives information on blood cells, blood clotting, the ABO and Rhesus systems, and a variety of blood diseases. It also has an interactive section under serology where you can find all the possible blood types of a child if the blood type of both parents is known, or the possible combinations of the parents blood types if the blood type of the child is known. A quiz is also available on the serology page, which will test your knowledge on the ABO system.