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.
It's only the difference in pronunciation. In English, lootenant is chiefly the American pronunication and leftenant the British. In the British and U.S. armies, 1st and 2nd lieutenants are junior officers, and the ranking system is roughly equivalent between the two armies.
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.