Endless Facts, One Snippet at a Time
The Bone Marrow: Where New Blood Is Born
- Life Factory: Bone marrow makes about 200 billion new blood cells daily.
- Two Types: Red marrow makes cells; yellow marrow stores fat.
- Immune Birthplace: White blood cells are created here to fight infection.
- Regeneration Core: It constantly replaces worn-out red blood cells.
- Lifelong Producer: Every major bone contains some active marrow.
- Transplant Lifesaver: Donated marrow can rebuild entire immune systems.
- Oxygen Bridge: New red cells carry life-sustaining oxygen to every tissue.
- Growth Zone: In children, nearly all bones are filled with red marrow.
- Aging Shift: Fatty yellow marrow replaces active red marrow over time.
- Blood Renewal: Within 120 days, nearly all your red blood cells are brand new.