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].
Structure of a Typical Long Bone Long bones have a tubular bone shaft, consisting of a bone collar surrounding a hollow medullary cavity, which is filled with yellow bone marrow in adults. Epiphyses are at the ends of the bone, and consist of internal spongy bone covered by an outer layer of compact bone.The epiphyseal line is located between the epiphyses and diaphysis, and is a remnant of the epiphyseal plate. The external surface of the bone is covered by the periosteum.piphyses are at the ends of the bone, and consist of internal spongy bone covered by an outer layer of compact bone. The epiphyseal line is located between the epiphyses and diaphysis, and is a remnant of the epiphyseal plate. The external surface of the bone is covered by the periosteum.