HUMAN ANATOMY AND PHYSIOLOGY

COMPOSITION OF BLOOD

Blood is a complex fluid with suspended cells cells constitute about 45 percent and the fluid called plasma constitute 55 percent of blood 

A. Cell:: A red blood corpuscles (RBC) or erythrocytes

               B white blood cells (WBC) or Leucocytes 

                c. platelets or thrombocytes (TC) 

B. Plasma :: a water :90-92%

                    b solids : 8-10%

plasma : it is a pale cream coloured fluid consisting of organic and inorganic substances in addition to the formed elements (RBC,WBC,TC) 

A.Organic substances:

1. proteins : serum albumin globulin fibrinogen prothrombin etc form 7.5% of total 9% solids contained in plasma

2.NPN i.e. Non protein nitrogenous substances are urea uric acid creatinine hypoxanthine amino acids and ammonia 

3. carbohydrates: glucose and other sugars 

4. fats : neutral fats cholesterol phospholipids etc 

5. various substances: hormones antibodies enzymes vitamins etc 

6. colouring substances like bile pigments bilirubin and biliverdin 

B. inorganic substances are salts of sodium potassium calcium phosphorus magnesium etc