So, type A people can’t donate their blood to type B people and vice versa. The human body naturally makes antibodies that will attack certain types of red-blood-cell antigens. For example, people with type A blood have A antigens on their red blood cells and make antibodies that attack B antigens people with type B blood have B antigens on their red blood cells and make antibodies that attack A antigens. Antibodies latch onto foreign substances that enter the body, such as bacteria and viruses, and clump them together for removal by other parts of the immune system.
An antigen is anything that elicits a response from an immune cell called an antibody. The “type” actually refers to the presence of a particular type of antigen sticking up from the surface of a red blood cell.
#Rh negative blood series
Through a series of experiments, Landsteiner classified blood into the four well-known types. The ABO blood group was discovered in the first decade of the 1900s by Austrian physician Karl Landsteiner. But why humans and apes have these blood types is still a scientific mystery. Humans and all other apes share this trait, inheriting these blood types from a common ancestor at least 20 million years ago and maybe even earlier, claims a new study published online today in Proceedings of the National Academy of Sciences. The ABO blood group, as the blood types are collectively known, are ancient. When you get a blood transfusion, doctors have to make sure a donor’s blood type is compatible with the recipient’s blood, otherwise the recipient can die.
Navy photo by Mass Communication Specialist 3rd Class Jake Berenguer/WikicommonsĮveryone’s heard of the A, B, AB and O blood types. Blood banks run blood type tests before blood is sent to hospitals for transfusions.
0 kommentar(er)
