What is the composition of plasma in the blood?
A) 50% water, 40% proteins, 10% solutes
B) 70% water, 20% proteins, 10% solutes
C) 92% water, 7% proteins, 1% solutes
D) 80% water, 15% proteins, 5% solutes
E) 60% water, 30% proteins, 10% solutes
Explanation: Plasma is composed of 92% water, 7% proteins, and 1% solutes (carbohydrates, amino acids, ions), making it a crucial part of the extracellular fluid contained in the cardiovascular system.