Blood

 Blood is a liquid connective tissue that maintain connection to whole body cell and carries oxygen to cell and carbondioxide from cell. Blood consist with RBC,  WBC,  Platelet and plasma.  Plasma  is ihe liquid part of the blood consist with salt,  water and different solution. 

Serum is yellow liquid of blood except RBC,  WBC,  Platelet,  necessary protein for coagulation. 

RBC contains haemoglobin and carries gas between lung and cell. 

WBC act as body defence system.  It destroys pathogen by phagocytosis. It is also called leucocytes. 

There exist two types of WBC

Agrunolocytes: Non granular WBC.  Example,  Lymphocytes with big nucleus produces antibody and monocytes with small nucleus and defence pathogen by phagocytosis. 

Granulocytes: Granular WBC.  These are in three types and each have different function. 

Neutrophil phagocytosis

Eosinophil and basophil have anti allergic function and basophil have anti coagulant effect. 

Platelet: 

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