Blood cells are produced by the bone marrow.
The Role of Bone Marrow
The bone marrow is the soft, spongy tissue found inside our bones. It's like a factory constantly working to create new blood cells. Specifically, it is responsible for making about 95% of the body's blood cells. This includes:
- Red blood cells: These cells carry oxygen throughout the body.
- White blood cells: These cells are part of the immune system and fight off infections.
- Platelets: These cell fragments help with blood clotting.
Where Is Bone Marrow Located?
Bone marrow is not just in one bone but is found throughout the skeleton, particularly in:
- The vertebrae (bones of the spine).
- The pelvic bones.
- The sternum (breastbone).
- The ribs.
- The ends of the long bones (like the femur or thigh bone).
Why Is Bone Marrow Important?
Bone marrow is vital because:
- It continuously produces new blood cells to replace old or damaged ones.
- It provides the body with a constant supply of cells needed for oxygen transport, immune defense, and blood clotting.
| Blood Cell Type | Function | Produced in the Bone Marrow |
|---|---|---|
| Red Blood Cells | Oxygen Transport | Yes |
| White Blood Cells | Immune Defense | Yes |
| Platelets | Blood Clotting | Yes |
