The light yellow liquid part of blood is called plasma. 55% of blood is plasma. It consists of 90-92% water and 8-10% solids. There are two types of components of plasma. Organic material and inorganic material
1. organic matter
(i) Nutrients: glucose, amino acids, vitamins etc.
(ii) Plasma proteins: albumin, fibrinogen, prothrombin, albumin, globulin etc. (7.5%).
(iii) Lubricants: neutral lipids, cholesterol, phospholipids, lecithin etc.
(iv) Pigments: bilirubin, biliverdin, carotene, xanthophyll etc.
(v) Organic acids: citric acid, lactic acid etc.
(vi) Excretory substances: urea, uric acid, creatinine, xanthine, ammonia etc.
2. inorganic material
(i) Liquid content: It contains 90%-92% water.
(ii) Inert matter: It contains 9% inert matter.
(iii) Gaseous substances: Gaseous substances are- O2, CO2, N2 etc.
(iv) Minerals: Sodium, Potassium, Calcium, Magnesium, Iron etc.
(v) Ions: Na+, K+, Ca++, Cl-, HCO3-, HPO4- etc.