The body produces red blood cells in the bone marrow before releasing them into the bloodstream. They are typically flat and rounded with a dip toward the center. Red blood cells contain hemoglobin, which carries oxygen around the body.
the proportion of red blood cells to other cells, or hematocrit.how many red blood cells are present, or red blood cell count.CBCs measure the three primary components of blood: red blood cells, white blood cells, and platelets.
