About 10-percent of the adult human body is made up of blood. Although blood looks the same in every person, there are huge differences in what blood consists of from person to person. Scientists and doctors are able to categorize blood types based on several factors.
It turns out that some blood types are a lot more common than others, which is good to know in case you ever require a blood transfusion or are interested in donating blood. Here’s a breakdown of the different blood types, including information on which is the rarest blood type in the world!
What Is a Blood Type?
There’s a reason why everyone has a different blood type. Blood is essentially made up of red blood cells, white blood cells, plasma, and platelets. Medical News Today says that blood groups depend on which antigens, also known as molecules, are on the surface of the red blood cells. Antigens vary from person to person depending on their genetics.
Every person has a certain blood type. It’s important to know your blood type in case you ever need to receive blood from another person for medical reasons. Blood types also determine who you can donate blood to.