flat bone
A bone that is shaped as a broad flat plate and composed of two thin layers of compact tissue enclosing between them a variable quantity of cancellous tissue, which is the location of red bone marrow. [ http://en.wikipedia.org/wiki/Flat_bone ]
Term info
flat bone
Examples: cranium, the ilium, sternum, rib cage, the sacrum and the scapula; the occipital, parietal, frontal, nasal, lacrimal, vomer, scapula, os coxC&, sternum, and ribs
Flat bones are those bones which are found where the principal requirement is either extensive protection or the provision of broad surfaces for muscular attachment
uberon
os planum
UBERON:0010428
In an adult mammal, most red blood cells are formed in flat bones