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].
Microscope at 40X. Spongy bone is a network of irregularly-shaped sheets and spikes of bone (trabeculae). The trabeculae are only a few cell layers thick. The spaces between the trabeculae contain red or yellow marrow, depending on a person's age and on which bone it is. The marrow in these images is red marrow.he trabeculae are only a few cell layers thick. The spaces between the trabeculae contain red or yellow marrow, depending on a person's age and on which bone it is. The marrow in these images is red marrow.