Search source
medlineplus.gov
Red Blood Cell (RBC) Count: MedlinePlus Medical Test
A red blood cell (RBC) count measures the number of red blood cells, also known as erythrocytes, in your blood. Red blood cells are made in your bone marrow, the spongy tissue inside your large bones.
This page saves a medical search source so citations open as regular web pages. It is not a clinical recommendation.