Physiology Plasma is the fluid poion of the blood which aids in the transpo of other substances in the body. Total plasma volume in relation with body weight is: A 5% B 10% C 20% D 25% 💡 Explanation Plasma is the fluid poion of the blood which aids in the transpo of other substances in the body. Total plasma volume in relation with body weight is: ✓ Correct Answer: A. 5%