NEET BIOLOGY

Detailed explanation-1: -Whole blood minus erythrocytes (RBCs), leukocytes (WBCs), and thrombocytes (platelets) make up the plasma. Serum, sometimes mistakenly considered synonymous with plasma, consists of plasma without fibrinogen. Plasma contains 91% to 92% of water and 8% to 9% of solids.

Detailed explanation-2: -Plasma is 90 percent water and makes up more than half of total blood volume. Other 10 percent is protein molecules, including enzymes, clotting agents, immune system components, plus other body essentials such as vitamins and hormones.

Detailed explanation-3: -Plasma is the liquid portion of blood. About 55% of our blood is plasma, and the remaining 45% are red blood cells, white blood cells and platelets that are suspended in the plasma. Plasma is about 92% water.

Detailed explanation-4: -So, the correct answer is ‘90%’.

Detailed explanation-5: -Plasma is derived when all the blood cells-red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes)-are separated from whole blood. The remaining straw-coloured fluid is 90–92 percent water, but it contains critical solutes necessary for sustaining health and life.