Bone Marrow

The soft tissue filling the cavities of bones. Bone marrow exists in two types, yellow and red. Yellow marrow is found in the large cavities of large bones and consists mostly of fat cells and a few primitive blood cells. Red marrow is a hematopoietic tissue and is the site of production of erythrocytes and granular leukocytes. Bone marrow is made up of a framework of connective tissue containing branching fibers with the frame being filled with marrow cells.

Year introduced: 1965

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Tree Number(s): A15.382.216

MeSH Unique ID: D001853

Entry Terms:

• Marrow, Bone
• Red Marrow
• Marrow, Red
• Yellow Marrow
• Marrow, Yellow
• Marrow

All MeSH Categories
Anatomy Category
Hemic and Immune Systems
Immune System
Bone Marrow