This video will provide you with a deeper insight on erythropoiesis i.e. the production of red blood cells. Furthermore, it will provide you with some minor details and mechanisms such as secretion of erythropoietin. This video is in two parts: Timeline 0:00 Introduction 0:36 Site of erythropoiesis 0:59 Causes of erythropoiesis 1:40 Requirements of erythropoiesis 2:10 Absorption of Iron 8:30 Iron storage in liver 10:04 Absorption of Vitamin B12 and Folic acid 14:50 Secretion of Erythropoietin by kidney 17:50 Formation RBCs in bone marrow 26:01 entering of Reticulocyte in blood stream 26:43 Why RBCs lack mitochondria 27:04 Function of erythrocytes 27:38 Importance of different minerals and vitamins in RBC maturation