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.
1 The endoplasmic reticulum, Golgi apparatus and microtubules are other features of the plant cell. 2  Both plant and animal cells include nucleus, cell membrane and mitochondria, which are part of their structure. 3  There are two types of reproduction in plants. There are two types of reproduction in plants. 2  They can be asexual, when the cell splits in two, and sexual, when two cells combine to create one living cell. 3  Plant cells have cell walls in which they can store water. 4  Cell walls of plants are made up of cellulose, hemicellulose and pectin.