Multiple choice Human erythrocytes are formed from precursor stem cells called hemocytes hemocytoblasts erythropocytes none of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation Hemocytoblasts (pluripotent hematopoietic stem cells) are the precursor cells that give rise to all blood cells, including erythrocytes (red blood cells). Hemocytes and erythropocytes are not the correct precursor cell names.