Blood Composition Poster
MacLean Bowie & Parker Respondek
Foreign substances that warrant the production of said antibodies are known as antigens. Ultimately anything that the body's antibodies deem threatening is an antigen. Unfortunately, antibodies do not just attack potentially harmful bacteria and viruses, during an organ transplant antibodies may reject the new organ and kill it.
The most important blood group when considering a blood transfusion. The blood type AB has both A and B antigens, meaning antibodies in all blood accept AB will reject it, and no antibodies, meaning it won't reject any blood. This makes AB the universal receiver. Blood type O on the other hand, has no antigens meaning it won't be attacked by the antibodies of any blood type. However, it has A and B antibodies so it can only receive O blood. This makes O the universal donor.
The blood group second in importance only to the ABO blood group, the Rh blood group's most important antigen is the D antigen. Whether or not you are Rh negative or Rh positive is determined by the presence of the D antigen surrounding your blood cells. Most people are Rh positive, however, for those who are Rh negative receiving Rh positive blood will cause you to reject it and produce antibodies to attack the D antigen.
Leukocytes, or more commonly known as white blood cells, are the body's defense mechanism against viruses and bacteria. There are various types of leukocytes, some will produce antibodies to attack antigens, some will devour the invaders, and some will simply flag the antigens and alert other leukocytes to attack it.
Platelets are our smallest blood cell, with no nucleus. We have hundreds of thousands of them for every microliter of blood. Without them we would eventually bleed out from a small cut. Once we start bleeding, platelets bind to the wound causing it to clot and block more blood from escaping.