Saturday, August 14, 2010 5:23:21 AM
Technically possible, but unlikely. The lungs are moist, so a seed could germinate, but with no sunlight once sprouted it would die, unless one of the very rare parasitic plants that can grow in other plants. In which case, it may be able to gather the nutrients it needs from the body for awhile I guess.
Plus I think your immune system would get quite pissed and try to take it out before then.