why does bone marrow create blood?

Answer 1

There are two types of bone marrow: red marrow (also known as myeloid tissue) and yellow marrow. Red blood cells, platelets and most white blood cells arise in red marrow; some white blood cells develop in yellow marrow.
So to be precise bone marrow doesn't produce blood. It produces SOME components of blood.
Four of the most important components of blood are red cells, white cells, platelets, and plasma.
Now you may ask why bone marrow creates blood cells. Then I would direct you to the first answer from wannabe med student. It does because it does!

Answer 2

Bone marrow transplantation (BMT) is a relatively new medical procedure being used to treat diseases once thought incurable. Since its first successful use in 1968, BMTs have been used to treat patients diagnosed with leukemia, aplastic anemia, lymphomas such as Hodgkin's disease, multiple myeloma, immune deficiency disorders and some solid tumors such as breast and ovarian cancer.

In 1991, more than 7,500 people underwent BMTs nationwide. Although BMTs now save thousands of lives each year, 70 percent of those needing a BMT using donor marrow are unable to have one because a suitable bone marrow donor cannot be found.
Bone marrow is a spongy tissue found inside bones. The bone marrow in the breast bone, skull, hips, ribs and spine contains stem cells that produce the body's blood cells. These blood cells include white blood cells (leukocytes), which fight infection; red blood cells (erythrocytes), which carry oxygen to and remove waste products from organs and tissues; and platelets, which enable the blood to dot

In patients with leukemia, aplastic anemia, and some immune deficiency diseases, the stem cells in the bone marrow malfunction, producing an excessive number of defective or immature blood cells (in the case of leukemia) or low blood cell counts (in the case of aplastic anemia). The immature or defective blood cells interfere with the production of normal blood cells, accumulate in the bloodstream and may invade other tissues.


Large doses of chemotherapy and/or radiation are required to destroy the abnormal stem cells and abnormal blood cells. These therapies, however, not only kill the abnormal cells but can destroy normal cells found in the bone marrow as well. Similarly, aggressive chemotherapy used to treat some lymphomas and other cancers can destroy healthy bone marrow. A bone marrow transplant enables physicians to treat these diseases with aggressive chemotherapy and/or radiation by allowing replacement of the diseased or damaged bone marrow after the chemotherapy/radiation treatment.

While bone marrow transplants do not provide 100 percent assurance that the disease will not recur, a transplant can increase the likelihood of a cure or at least prolong the period of disease-free survival for many patients.

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Answer 3

The cells that grow divide and differentiate into the blood cells that flow through our arteries and veins live in the bone marrow located in the middle of our bones.

Answer 4

It's a good question - it's kind of like asking why it is the pancreas that secretes insulin.

The answer is: because it does.

A more detailed answer would encompass the evolutionary reasons behind why this area of the body became the site for erythropoeisis (Red Blood Cell Synthesis).

A likely reason is that the cells that create erythrocytes (red blood cells) are are closely related to the cells that create and destroy bone (and many other cells of the immune system - it's very complicated.)

Answer 5

Bone marrow has a population of stem cells that are precursors to the blood cells. There are megaprokaryocytes which make platelets. There are myelobasts that are precursors to white blood cells and there are erythroid precursors that make red blood cells. All these precursor cells respond to certain hormones or humeral factors that stimualte the production of the particular cell line. For example, erythropoetin is a chemical produced by the kidney that stimulates production of red blood cells from its precursor cells. This chemical causes the precursor cells to multiply and differentiate. Similarly, there are other factor (colony stimulating factor, etc) which work similarly for white blood cell and platelet production. Some of these factors are produced by other cells in response to certain stimuli.

Answer 6

Ask how not why.

To answer your question, because evolution happens randomly and it just so happened that it was bone marrow.

Answer 7

Red blood cells have no nucleus and no chromosomes to be able to divide (by meiosis) and therefore have to be made by something else (rather than divide by themselves like other cells do).
The reason for the lack of DNA/Chromosomes etc is because they need all the space they can to carry oxygen.

Answer 8

because that's where mother nature put our blood factories and further more without blood, how are we going to bleed??? but seriously being in the bone protects our source of blood and blood is the hi way that food, air and other stuff travels all over our bodies we can't live without it.
God bless,
gabe.

Answer 9

bonemarrow have stemcell which differentiate into numerous style of cells one among those are reticulocyte which style all styles of blood cellular after the formation of those cells greater advantageous maturation and differentiation occurs in lymph nodes . yet in case of immune reaction lymph nodes additionally play area in starting to be some particular style of cells.