Human Physiology

Lesson 29 : Blood Composition , Function


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.

Last modified: Tuesday, 10 April 2012, 11:16 AM