The hematological system performs several functions related to red and white blood cells, the process of coagulation and platelets, bone marrow, and the spleen. The immune system is the body's way of fighting off unwanted invaders. During this game you will learn how certain words in these systems are broken down into prefixes and suffixes. You will also learn how the prefixes and suffixes form to make a word. Match the correct suffix with it's prefix and definition of the two put together.