erythropoietic cell cultures from very early chick blastoderms survive for several days they show four to seven doublings of the erythroid cells and the appropriate morphological changes from proerythroblasts to mature erythrocytes cell cycle times are the same as in ovo for the first day of culture , but slow down thereafter the hemoglobins of both the primitive and the definitive red cell series are produced .
C0019046
hemoglobins
C0014792
red