It is estimated that one in ten people will have a kidney stone at some time in their lives. The prevalence of kidney stones in the United States increased from 3.8% in the late 1970s to 8.8% in the late 2000s. This increase was seen in both men and women, and both whites and blacks.The lifetime risk of kidney stones is about 19% in men and 9% in women. In men, the first episode is most likely to occur after age 30, but it can occur earlier.t is estimated that one in ten people will have a kidney stone at some time in their lives. The prevalence of kidney stones in the United States increased from 3.8% in the late 1970s to 8.8% in the late 2000s. This increase was seen in both men and women, and both whites and blacks.
Compact bone is found wrapped around the cancellous bone to protect it and is made up of osteons. These osteons are cells composed of delicate layers of lammelae which protect the nerves and blood of the inner core compact bone. On death osteons transform into lammelae and produces barrier between osteon cells located inside the compact bone matrix. Due to this the strength and density of compact bones builds up.
The osteon is the structural unit of compact bone. Haversian system  is a microscopic, structural unit of compact bone also called the  osteon. The osteons are arranged in m â¦ ultiple layers or rings called  concentric lamella.16 people found this useful.he function of bones is to support the body, protect the vital  organs, allow movement, store minerals and growth factors, and form  blood cells.