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.
Regrowing Muscle Tissue - There are 3 types of muscle cells: Striated muscles, such as those that move the skeleton, smooth muscles, such as the muscles contained in the stomach and other internal organs, and cardiac muscle, which makes up most of the heart wall.