The soft material rich in fat, connective tissue fibers, and cells that fills the cavities of bones.
A soft, highly vascular and specialized connective tissue found in the medullary cavity of most bones; capable of producing blood cells.
Soft tissue in cancellous bone. In young animals red marrow is concerned with blood formation while in adults it becomes progressively replaced with fat and is known as yellow marrow.
The pliable material found within the hollow spaces of long bones responsible for producing red blood cells.