After all, a nail is sharp, and the inside of the nose is sensitive. Putting a foreign object deep into your nasal cavity isn't particularly comfortable, and it can be certainly painful when the performer is learning to do the trick. However, another obstacle -- sneezing -- can be harder to overcome.
Osteoclasts are the bone cell that destroys bone. This allows bone  remodeling, and allows the skeletal system to act as a reservoir  for minerals to maintain blood mineral â¦ levels. Bone cells that are involved in reabsorption and breakdown of the  bone matrix are referred to as osteoclasts.
This matrix is produced and secreted by osteoblasts. Osteoblasts make bone in response to growth factors and mechanical stress on the bone. Counteracting the osteoblast activity are osteoclasts - the bone reabsorbing cells. Osteoclasts make and secrete digestive enzymes that break up or dissolve the bone tissue. Osteoclasts then take up or 'absorb' the bone debris and further break it down inside the cell.