Can you live without bone marrow?
No- bone marrow is the source of all your red blood cells (which
carry oxygen), platelets (which help clot your blood) and white
blood cells (which fight infections). Although you can replace your
red cells and platelets with blood transfusions, you cannot replace
your immune system, so you would contract infection after
infection, and eventually that would lead to death. A condition
that causes this would be aplastic anaemia.