Red Blood Cells Carry Oxygen from Your Lungs to the Rest

Multiple Choice

Red blood cells carry oxygen from your lungs to the rest of your body. Normal red blood cell levels (RBC) for men are 4.5 million to 6.2 million cells/μl. If an RBC is reported to be 5.3 million cells/μl, how many red blood cells are in 1 ml of this blood?

A) 5.0 billion cells
B) 5.4 billion cells
C) 5.1 billion cells
D) 5.5 billion cells
E) 5.3 billion cells