In a bone, the osteocytes and layers of extracellular matrix, which are concentrically clustered around a central canal, form a cylinder-shaped unit called an osteon, or Haversian system. Many osteons cemented together form the substances of bone.Hope that helped!
what the hell. The osteon, or Haversian system, is the fundamental functional unit of much compact bone. Osteons, roughly cylindrical structures that are typically several millimeters long and around 0.2mm in diameter, are present in many of the bones of most mammals, birds, reptiles, and amphibians.
Osteocytes grow bone (lay it down) and osteoclasts break down bone. So there will be many more cells laying down bone (osteocytes) in primary bone.
Typically, a chromosome contains hundreds to thousands of genes.
A gene typically contains thousands to millions of nucleotides.
A normal beer typically contains 12 ounces.
A bar of music typically contains four measures.
A peg of beer typically contains one pint.
A standard glass of wine typically contains about 150 milliliters.
A bar of music typically contains four measures.
A roll of film typically contains 24 or 36 photos.
A roll of film typically contains 24 or 36 pictures.