bone marrow

bone marrow   n.  The soft, fatty, vascular tissue that fills most bone cavities and is the source of red blood cells and many white blood cells.

bone marrow

See marrow.

Main Entry: bone marrow
Function: noun
: a soft highly vascular modified connective tissue that occupies the cavities and cancellous part of most bones and occurs in twoforms: a : a whitish or yellowish bone marrow consisting chiefly of fat cells and predominating in the cavities of the long bones called also yellow marrow b : a reddish bone marrow containing little fat, being the chief seat of red blood cell and blood granulocyte formation, and occurring in the normal adult only in cancellous tissue especially in certainflat bones called also red marrow

bone marrow n.
The soft, fatty, vascular tissue filling the cavities of bones, having a stroma of reticular fibers and cells.