The Democratic-Republican Party was the American political party in the 1790s of Thomas Jefferson and James Madison formed in opposition to the centralizing policies of the new Federalist party. It came to power in 1800, and dominated national and state affairs until the 1820s, when it faded away.
Spongy bone of the diaphysis is transformed into compact bone the activity of osteoclast (remove bone and widen marrow cavity). Osteoblast lay down concentric lamellae of bone making the Haversain system [structural unit of bone].
Cortical bone is dense and forms the surface of bones. It is solid in appearance, and constitutes as 80% of total bone mass. Compact bone is composed of many cylinder shaped units called osteons, or Haversian Systems (after the anatomist who discovered them.).Spongy Bone: Cancellous bone is a type of osseous tissue with a low density and strength but very high surface area, that fills the inner cavity of long bones.Cancellous bone lies between two layers of compact bone, and this helps contribute to bone strength. As you can guess by it's name, it looks spongy, or porous.ortical bone is dense and forms the surface of bones. It is solid in appearance, and constitutes as 80% of total bone mass. Compact bone is composed of many cylinder shaped units called osteons, or Haversian Systems (after the anatomist who discovered them.).