Sample essay on Blood Group



K. Landsteiner classified human blood into four groups in 1902 AD. These groups are A, B, AB and O. Blood group O is called universal blood donor because blood of O group can be given to any of the other groups. Similarly blood group "AB" is called universal blood acceptor because it accepts blood from all blood groups.

Blood Clotting-

Blood clotting or coagulation is a process which stops the flow of blood from some injury. An insoluble protein called fibrin is essential for blood clotting. The person suffering from "Haemophilia" has a problem in blood clotting. The flowing blood does not stop easily. The Ph value of the blood is 7-4 and it is basic in nature.

Rh Factor-

Rh factor is a blood antigen found in R.B.C. of J blood. The persons who have Rh factor in themselves are called RH+ and the persons do not have Rh factor in themselves are called RH.

Blood Pressure-

A normal person has blood pressure of 80 mm of Hg. The heartbeat of a normal person is 70-72 per MINUTE.