
1) Red blood-cell source 2) Source of red blood cells 3) Substance that may be donated
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Spongy material found in the hollow part of the bone where red and white blood cells and platelets are produced.
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soft, gelatinous tissue that fills the cavities of the bones. Bone marrow is either red or yellow, depending upon the preponderance of hematopoietic ... [16 related articles]
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http://www.britannica.com/eb/a-z/b/90

Image credit: Schneider Children's Hospital The soft, fatty, vascular tissue that fills the cavities in large bones and and contains hematopoietic stem cells, from which develop erythrocytes (red blood cells), many leukocytes (white blood cells), and platelets. The bone marrow also contains m...
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Soft fatty substance that is found within the spaces inside bone. It may be red or yellow, and is the place where most of the blood cells are formed.
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<haematology> The soft, spongy tissue found in the centre of most large bones that produces the cellular components of blood: white cells, red cells and platelets (haemopoiesis). It is also the most radiation sensitive tissue of the body. ... (12 May 1997) ...
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The inner, spongy tissue of bones where blood cells are made.
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A spongy substance inside the body's large bones. Our blood cells are made in the bone marrow.
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soft tissue in the hollow interior of bones. In adults, bone marrow in large bones produces new blood cells. Bone marrow composition is one way that biologists can study what the health of an animal was when it died.
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Bone marrow is a soft, often fatty, tissue found inside bones. It produces blood cells.
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Our Bone marrow Main Article provides a comprehensive look at the who, what, when and how of Bone marrow Bone marrow: The soft blood-forming tissue that fills the cavities of bones and contains fat and immature and mature blood cells, including white blood cells, red blood cells, and platelets. Diseases or drugs that affect the bone marrow can affe...
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Bone marrow is the soft, spongy tissue in the centre of bones that produces blood cells.
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Bone marrow is the soft, fatty network of connective tissue that fills the medulla, the internal cavity of the bone. The marrow contains stem cells that produce the three cellular components of blood: platelets, leukocytes and red blood cells. The tissue also contains osteoprogenitor cells that help in the formation and growth of new bone. Bone mar...
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http://www.spine-health.com/glossary/b/bone-marrow

Soft tissue located in the cavities of the bones where blood cells are formed, including erythrocytes, leukocytes, and platelets.
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http://www.virology.net/ATVGlossary.html

a spongy material in the center of large bones
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https://sciencetrek.org/sciencetrek/topics/blood/glossary.cfm

the jelly-like substance inside the bones where red blood cells, white blood cells, and platelets are made
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soft tissue located in the cavities of the bones where blood cells are formed, including erythrocytes, leukocytes, and platelets
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Soft tissue located within bones that produce all blood cells, including the ones that fight infection.
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https://www.cdc.gov/vaccines/terms/glossary.html

Soft tissue located within bones that produce all blood cells, including the
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the fatty yellow or red tissue inside bones that is responsible for producing blood cells
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noun very tender and very nutritious tissue from marrowbones
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Substance found inside the cavity of bones. In early life it produces red blood cells but later on lipids (fat) accumulate and its colour changes from red to yellow. Bone marrow may be transplanted in the treatment of some diseases, such as leukaemia, using immunosuppressive drugs in the recipient to...
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Soft spongy tissue found in the hollow part of the bone where red blood cells are produced.
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https://www.encyclo.co.uk/local/22027

Soft spongy tissue found in the hollow part of the bone where red blood cells are produced.
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https://www.essential-tremor.com/glossary/

marrow (def. 1).
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https://www.infoplease.com/dictionary/bone-marrow
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