According to the sources, human plasma contains three major proteins: fibrinogen, globulins, and albumins . Globulins are specifically identified as being primarily involved in the defence mechanisms of the body . In contrast, the sources state that albumins help maintain osmotic balance, while fibrinogens are necessary for the clotting or coagulation of blood . Oxygen transport is the function of haemoglobin present in erythrocytes . Mastering these specific functional roles is a high-priority strategy for medical aspirants, as approximately 95% of NEET Biology questions are derived directly from the NCERT textbooks .