No one can tell for sure, but the word was used as rib.
Ribs are flat bones, they have bone marrow, bone marrow has blood cells, some cells are creator cells which have genes in them…there ya go! 
No one can tell for sure, but the word was used as rib.
Ribs are flat bones, they have bone marrow, bone marrow has blood cells, some cells are creator cells which have genes in them…there ya go!