Adult and fetal Bone Marrow - b lympocytes and t lymphocytes BOTH come from here but the b cells stay in the marrow when maturing while the t cells go to the thymus and mature
also, adult rbc - come from bone marrow and end here too
fetal rbc - liver and spleen (rbc's begin here and end in here)
someone correct me if i'm wrong, i think i'm a bit unsure on some of this esp. when it comes to the fetus