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].
Bone consists of two layers: a compact outer layer, called cortical bone, and a porous inner layer, called spongy (or cancellous) bone. Osteoporosis weakens mostly bones with a large percentage of spongy bone.These include the vertebrae (bones of the spine), the hips, and the wrists. Bones of this kind are more fragile and are especially prone to fracture when affected by osteoporosis.one consists of two layers: a compact outer layer, called cortical bone, and a porous inner layer, called spongy (or cancellous) bone. Osteoporosis weakens mostly bones with a large percentage of spongy bone.