A specialized bone cell that produces and deposits the matrix that is needed for the development of new bone and consists primarily of collagen fibers. Osteoblasts are formed from osteoclasts on the outer surfaces of bone and in bone cavities, and bone deposition takes place constantly in living bone. As new bone grows and hardens with the addition of calcium and phosphate, osteoblasts become embedded in the bone matrix and develop into osteocytes.
Making the world better, one answer at a time. Many animals live in Rome. The Brown Bear and European Lynx, which were thought to be extinct in Italy, have made a comeback. Other animals include Italian Deer, Italian Porcupine, Wild Boars, and over 70 species of birds, including seagulls, starlings, and the Hoopoe Bird.
The most popular sport in Rome was chariot racing. It was so popular that larger and larger stadiums had to be built. It is claimed that the Circus Maximus in Rome had room for more than 350,000 spectators. Chariots were usually pulled by four horses but it could be by as few as two or as many as ten. Four rival groups (Romans called them factions) took part. These factions were known by the colours that their drivers wore (white, green, blue or red).