Whoever wears a Panerai on their wrist calls attention to themselves thanks to the watches' unique designs. These impressive watches range from 42 mm to 48 mm in diameter and are descendants of models from the 1930s and 1950s. During this time, Panerai supplied the Italian marines with their diving instruments.
An osteoclast (from the Greek words for bone (á½ÏÏÎ­Î¿Î½), and broken (ÎºÎ»Î±ÏÏÏÏ)) is a type of bone cell that breaks down bone tissue. This function is critical in the maintenance, repair, and remodelling of bones of the vertebral skeleton.The osteoclast disassembles and digests the composite of hydrated protein and mineral at a molecular level by secreting acid and a collagenase, a process known as bone resorption.his last hormone, IL-6, is one of the factors in the disease osteoporosis, which is an imbalance between bone resorption and bone formation. Osteoclast activity is also mediated by the interaction of two molecules produced by osteoblasts, namely osteoprotegerin and RANK ligand.
os'teÂ·oÂ·clas'tic adj. osteoclast. A specialized bone cell that absorbs bone, allowing for the deposition of new bone and maintenance of bone strength. Osteoclasts secrete enyzmes that dissolve the matrix of old bone tissue and acids that dissolve bone salts, which contain calcium and phosphorus. Except in growing bone, the rate of bone deposition and bone absorption equal each other so that bone mass remains constant. A mass of osteoclasts absorbs bone from the outer surfaces inward for about three weeks.