the articular surface of the femoral heads of young ( 5 month-old ) and old ( 21 month-old ) female rats were examined with the use of the scanning electron microscope using an especially sensitive preparative technique in which the femoral heads were fixed in a glutaraldehyde-paraformaldehyde fixative , post-fixed in oso4 , dehydrated in ethanol and critical point dried .
C0015811
femoral
C0015813
femoral heads