MARROW

n. Ma'Vo. A.-S., im-iy, ini'/irh. (Jr.. nveA<5. Lat., rdiilla. Fr, moellr. Ger., KiKH-hi'iunnrk. Knix-ltnifitt, Mark. A soft reddish or yellowish substance filling the medullary cavities and canals of bones. In the medullary cavity of the long bones it is yellow (yellow m.) and is composed of fat-cells supported by retiform ti ue. In the articular ends of the long bones and in the other bones the fat-cells are fewer, but numerous rounded nucleated cells (see JW.-CELLS [2d def.]) are present, and smaller reddish cells like the primitive nucleated corpuscles of the embryo, which have been regarded as transition forms between m.-cells and red blood corpuscles (red m.). [C.] Cf. M.-CELLS. Beef-m. Lat., medulla bovilla (seu bovina [Belg. Ph.], seu bovis). Fr., moelle de bieitf [Fr. Cod.]. Ger., Rindermark, Rindxmark. Sp., gras a de medula de vac a, tuetano de toro [Sp. Ph.]. The m. obtained from the long bones of a cow or ox; used as an article of food. [B.] Cartilage in., Embryonic in. See Fuetal m. Fatty in. See Yellow m. Foetal m. Fr, moelle du cartilage (on faitale, on sanguine). Ger, Knorpelmark. The ma , consisting of blood-ve els, osteoblasts, and mucoid connective ti ue, which fills the primary cavities or medullary spaces of a developing endochondral bone. [J, 30, 32.] Gelatinous in. Fr, moelle ye latin i for me. Ger., pefdHn * Knochenmark, Gallertmark. Semi-transparent, soft, gray, or red m. sometimes found in healthy persons, but most frequently observed after protracted diseases, [a, 34.] Lyniphoid in. See Red m. Primary m. See Cartilage m. Red in. Fr., moelle rouge. Ger, rothes Mark. The reddish non-fatty m. contained in the articular ends of the long bones, in the flat and short bones, the vertebrae, sternum, and ribs. [BJ See under M. Spinal m., Vertebral in. See Spinal CORD. Yellow m. Fr., moellejaune. Ger., gelbes Mark. The soft yellow m. filling the shafts of the long bones. It contains 96 per cent, of fat. [B.] [s. 714]