Blood: is suspension of blood cells in plasma. It is a fluid connective tissue consisting of cellular elements suspended in fluid matrix called plasma.
Blood cells: are formed elements e.g. Erythrocytes, Leucocytes and thrombocytes.
Plasma: is fluid part of blood.
Hematocrit: is fractionation of blood into cells and plasma by application of centrifugal force.
Anticoagulant: are chemicals or agents that prevents clotting of blood e.g. Sodium citrate, Sodium oxalate, Heparin, Ethylene diamine tetra acetic acid (EDTA).
Antigen: are high molecular weight molecules that are capable of inducing immuneresponse.
Clotting factors: are inactivated enzymes present in blood plasma which takes part in coagulation process.
Antibodies: also called immunoglobulins are specific protein molecules involved in immunological reactions against specific antigen.
