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.
Definition of countenance. 2a : calm expression He managed to keep his countenance through the ordeal.b : mental composure â¦ startled, and also somewhat out of countenance. 4 : face, visage; especially : the face as an indication of mood, emotion, or character The photograph showed his somber countenance. Examples of countenance in a sentence. â¦ 1  his white countenance was rendered eerie by the redness of the sagging lids below his eyes â¦ âJohn Updike, The Afterlife, 1994. 2  You could see it in his frame and deportment â¦ a beaming countenance, expansive salutations, a warm handshake â¦ âSimon Schama, Granta, Autumn 1990.