Today people strive to great lengths to keep their body in a good, healthy condition. Every system in the body, let it be digestion, circulatory (of blood), immune, respiratory, cellular respiratory or kidneys and excretion are all vital. Each have their separate roles, but not one works separately. The human body works as a whole in order to survive, even though not all goes well all the time. The digestive system is in charge of …showed first 75 words of 2765 total…

…showed last 75 words of 2765 total…because it has no antigens. Type O can only receive from type O though. Type AB have both A and B antigens so it’s the universal receptor. Type A has A antigens and Type B has B. Both of these can only accept their own and type O. Blood antigens are called agglutinogens. The lymphatic system will produce antigens to combat the invaders. A Rh factor is another important antigen found on some cells.