Page 23 - The Miracle of the Blood and Heart

Multipotent stem
cells

Myeloid Lymphoid
stem cell stem cell

Erythroblast Megacaryoblasts Myeloblast

Megakaryocyte

Erythrocytes Thrombocytes
(red blood cells) B lymphocyte T lymphocyte
developing in developing in
bone marrow the thymus
Basophil Eosinophil Neutrophil Monocyte

Granular leukocytes Non-granular leukocytes

White blood cells
The stages by which the various blood cells form in the red marrow.
Multipotent stem cells develop into specialized stem cells known as myeloids and
lymphoids. A myeloid stem cell can in turn develop into erythrocytes, thrombo-
cytes and white blood cells (other than lymphocytes). The lymphoid stem cells
permit the formation of lymphocytes, which play a major role in defense. Thanks
to this deliberate differentiation of stem cells, blood cells with various functions
are produced.

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