Medullary cavityThe medullary cavity (medulla, innermost part) is the central cavity of bone shafts where red bone marrow and/or yellow bone marrow (adipose tissue) is stored; hence, the medullary cavity is also known as the marrow cavity. Located in the main shaft of a long bone (diaphysis) (consisting mostly of compact bone), the medullary cavity has walls composed of spongy bone (cancellous bone) and is lined with a thin, vascular membrane (endosteum). This area is involved in the formation of red blood cells and white blood cells, and the calcium supply for bird eggshells.
Gold reserveA gold reserve is the gold held by a national central bank, intended mainly as a guarantee to redeem promises to pay depositors, note holders (e.g. paper money), or trading peers, during the eras of the gold standard, and also as a store of value, or to support the value of the national currency. The World Gold Council estimates that all the gold ever mined, and that is accounted for, totalled 190,040 metric tons in 2019 but other independent estimates vary by as much as 20%.
Gross processingGross processing, "grossing" or "gross pathology" is the process by which pathology specimens undergo examination with the bare eye to obtain diagnostic information, as well as cutting and tissue sampling in order to prepare material for subsequent microscopic examination. Gross examination of surgical specimens is typically performed by a pathologist, or by a pathologists' assistant working within a pathology practice.