the capacity of the bone marrow to give rise to t cells in advanced age was studied in vitro by reconstituting fetal thymic lobes from 14-day c57bl/ka ( thy-1.1 ) mice with bone marrow cells from old ( 24-month ) or young ( 3-month ) c57bl/6 ( thy-1.2 ) mice .
C0005953
bone marrow
C0005955
bone marrow cells