![]() Our blood types are determined by heredity. The plasma contains salts and various kinds of proteins. The platelets help the blood to clot, if you get a wound for example. One type of infection-fighting white blood cells fight disease by producing antibodies and thus destroying foreign materia. Red blood cells transport oxygen to, and remove carbon dioxide from, the body tissues. The red blood cells contain hemoglobin, a protein that binds oxygen. This is a scanning electron microscope image of human blood. Image source: National Cancer Institute, USA. ![]() Among other things, blood transports oxygen to various parts of the body.īlood consists of several types of cells floating around in a fluid called plasma. What is blood made up of?Īn adult human has about 4–6 liters of blood circulating in the body. The designation Rh is derived from the Rhesus monkey in which the existence of the Rh blood group was discovered. There are many blood group systems known today, but the ABO and the Rh blood groups are the most important ones used for blood transfusions. Later, in 1940, Landsteiner was part of discovering another blood group, the Rh blood group system. This misunderstanding led to fatal blood transfusions. Before Nobel Prize awarded Karl Landsteiner discovered the ABO human blood groups in 1901, it was thought that all blood was the same.
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