What percentage of the blood volume is blood plasma and how much of it are RBCs? a) Plasma: 40%, RBCs: 60%. b) Plasma: 50%, RBCs: 50%. c) Plasma: 60%, RBCs: 40%. d) Plasma: 70%, RBCs: 30%.
In the human blood, plasma typically makes up about 55% of the total blood volume, while red blood cells (RBCs) make up about 45%. Therefore, option a) is the closest approximation.
