Hematopoietic stem cells (HSCs), or blood [url=https://inma-ita.ro/wp-co1/en/2018/09/06/hello-world/]https://inma-ita.ro/wp-co1/en/2018/09/06/hello-world/[/url], are contained in bone marrow and circulatory system and blood are the precursors of all circulating blood cells.