Compact Bone. Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix.Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.ompact Bone. Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix.
LEFTenant is the way British troops pronounce the rank Lieutenant. The two words mean different things within different military groups, but there is no actual difference. A British troop can refer to an American Lieutenant as  leftenant and not be incorrect.
1 The name revenant is of French origin, and generally means one who returns (from death).2  When compared to the monster as it appears in the game, the revenant model built during the game's development shows a good deal more muscle tissue, and no chest armor.or the monster in Doom 3, see Revenant (Doom 3). A revenant on the move in Level 6: The Crusher, in Doom II. Revenants are monsters introduced in Doom II that are easily recognized by their high-pitched shriek.