Why do blood types differ?

Answer 1

Answer:Blood Type is a classification for some of the proteins (antigens) found on the red blood cells our bodies make. People who have "type A" blood also produce "Type A" antigens AND produce "Anti blood type B" antibodies.

Same goes for someone who has blood "type B". They produce "Type B" antigens and produce "Anti blood type A" antibodies.

When a person receives the 'wrong blood type' what is happening is that the persons own "Anti blood type antibodies" are attacking the new red blood cells because the new red blood cells have the protein saying they are "A" or they are "B" all over them.

People who have blood type "AB" make BOTH antigen proteins on their red blood cells and they dont produce either of the 'anti blood type antibodies'. Since there are no antibodies there is nothing to fight with the red blood cells protein markers (aka antigens) so they do not have a bad reaction. They can get blood from anyone.

Blood type O is not like blood type A or B and its even different than blood type "AB".

The "O" means "Other". Even though the type of antigen protein their red blood cells have is 'other' than "A" or "B" they still produce the 'anti a' and the 'anti b' antibodies.

So they should only ever receive blood from other "blood type O" donors.

If you want to know how these types (and others) evolved, see Scientific American in the related link below.

Answer 2

There are three major types of blood cells, red blood cells, white blood cells, and platelets.

The different types of blood cells perform different specific tasks. For example,

The white blood cell's task is to fight of disease and infection. The immune system is made up of white blood cells, and people with low amounts of white blood cells are more susceptible to disease.

Red blood cells carry oxygen to the organs such as the brain heart and liver from the lungs.

I am not 100% sure about what platelets do.

However, I think that they are supposed to clump together and form blood clots over wounds and other areas. More research is required to know the specifics.

-Answerguyz

Answer 3

There are different antibodies that are present in your blood, some fight other blood types. Also, your blood cells have identifiers which the antibodies attack. This helps the body know what blood is yours and what blood is someone else's, however doctors can cheat the body's immune system. When they attack each other, it is called a transfusion reaction (but that is something else).

Answer 4

There are four different types of blood types. A, B, AB and O. Each can be negative or positive. A cannot mix with B, and B cannot mix with A. O is the 'Universal Donner', anyone can take O blood.

If a person had type A blood for example, and it was mixed with type B blood, that person would die.

Answer 5

Human blood has several types of cells. Red cells carry nutrients to the cells and carry the waste away. White cells attack germs like little soldiers in your body. There are other cells too like platelets that cause your blood to clot. So humans need all of these cells.

Answer 6

There are a total of around 30 different blood types throughout the world. Most of these types are highly rare, and there are three groups that are most prevalent: A, B and O. There is also an Rh factor in blood, noted by the positive or negative symbol after the letter. These letters and Rh factors are determined by inherited antigens and antibodies in a person's blood.

Answer 7

Because if the two types of blood were to mix, then the blood would clot.

Answer 8

The different type of blood cells in the human body are white blood cells and red blood cells.

Answer 9

Red Blood Cells and White blood cells