What are the percentages of cells and plasma in blood?

In a typical adult human, the composition of blood consists of approximately 45% cells and 55% plasma. The cellular component includes red blood cells, white blood cells, and platelets, while plasma is the liquid portion of blood that carries these cells, nutrients, hormones, and waste products.

When considering the correct answer, the closest representation offered is 40% for cells and 60% for plasma. However, it’s important to note that while these percentages are not exact, they approximate the expected distribution in a way that recognizes that the total composition can vary among individuals. The standard values typically cited are around 45% for cells (which often gets rounded down in certain contexts) and 55% for plasma, which is why 40% and 60% is the best available match in this context.

Other options present different distributions not commonly observed in healthy adults. For example, a 50-50 split would suggest an equal contribution of cells and plasma, which is not representative of normal human blood composition. Similarly, 60% cells and 40% plasma would imply a significantly higher cell count than is typical, indicating a condition such as dehydration or other disorders that could artificially elevate cell volume. Lastly, a 30%