Subject: Re: Researching the possible causes and mechanisms of Rheumatoid Arthritis
For the most part, blood cells and platelets develop from a common precursor cell in the red bone marrow.
The precursor cell, because it gives rise to many different cell types yet still remains to make more, is also called a stem cell.
The term "stem cell" is generic, and could refer not only to a cell type that manufactures blood cells but also to cells that generate the mature cells of other tissues
The particular stem cell that produces our blood cells is the hemocytoblast.
"Hemo-" is for blood, "cyto" is for cell, and "-blast" means a cell that can divide to make more cells.
Taken together, a hemocytoblast is a cell that can divide to make more and more blood cells.
The hemocytoblast remains in the red bone marrow.
There are two types of bone marrow: red marrow and yellow marrow.
hemocytoblasts also make the red blood cell, which gives marrow it is in is a red appearance.
A hemocytoblast can divide many times.
Each time it divides (mitosis) it is into two, one of its two daughter cells remains as a hemocytoblast; this ensures the continued existence of hemocytoblasts in the bone marrow.
The other daughter cell will change into a different type of cell.
The type of cell it becomes depends on the signals (like hormones) that find their way to the bone marrow from the blood.
Explanations: HEMOCYTOBLAST (Also called hemoblast, lymphoidocyte)
A pluripotential blast or stem cell thought to be capable of giving rise to all other blood cells.
Explanations: BLAST CELL: A cell that can divide to make more cells.