Back to Course Blood Cells 0% Complete 0/0 Steps Hematopoiesis 1 Topic Hematopoietic Stem Cell Peripheral Blood film Erythrocytes Participants 2 Silvia Aanabaiyan Abhay ArnoldSar Cherylpekly Blood Cells Erythrocytes Lesson 3 of 3 In Progress ← Previous Erythrocytes November 15, 2020 Oval biconcave disk, of size 6 – 8 micron. They lack a cell nucleus and most organelles. Abnormal shapes of the Red Blood Cells