Search results
Results From The WOW.Com Content Network
When osteocytes were experimentally destroyed, the bones showed a significant increase in bone resorption, decreased bone formation, trabecular bone loss, and loss of response to unloading. [ 6 ] Osteocytes are mechanosensor cells that control the activity of osteoblasts and osteoclasts [ 16 ] within a basic multicellular unit (BMU), a ...
The endosteum (pl.: endostea) is a thin vascular membrane of connective tissue that lines the inner surface of the bony tissue that forms the medullary cavity of long bones. [ 1 ] [ 2 ] This endosteal surface is usually resorbed during long periods of malnutrition , resulting in less cortical thickness.
It is synonymous with bone tissue formation. [1] There are two processes resulting in the formation of normal, healthy bone tissue : [ 2 ] Intramembranous ossification is the direct laying down of bone into the primitive connective tissue ( mesenchyme ), while endochondral ossification involves cartilage as a precursor.
In an ordinary microscopic section, viewed by transmitted light, they appear as fusiform opaque spots. Each lacuna is occupied during life by a branched cell, termed an osteocyte, bone-cell or bone-corpuscle. Lacunae are connected to one another by small canals called canaliculi. A lacuna never contains more than one osteocyte.
Bone tissue is removed by osteoclasts, and then new bone tissue is formed by osteoblasts. Both processes utilize cytokine (TGF-β, IGF) signalling.In osteology, bone remodeling or bone metabolism is a lifelong process where mature bone tissue is removed from the skeleton (a process called bone resorption) and new bone tissue is formed (a process called ossification or new bone formation).
The human skeleton of an adult usually consists of around 206 bones, depending on the counting of Sternum (which may alternatively be included as the manubrium, body of sternum, and the xiphoid process). [1] It is composed of 270 bones at the time of birth, [2] but later decreases to 206: 80 bones in the axial skeleton and 126 bones in the ...
All of the special connective tissue types have been included as a subset of fascia in the fascial system, with blood and lymph classed as liquid fascia. [14] [15] Bone and cartilage can be further classified as supportive connective tissue. Blood and lymph can also be categorized as fluid connective tissue, [2] [16] [17] and liquid fascia. [14]
The vertebral laminae: plates of bone that form the posterior walls of each vertebra, enclosing the spinal cord. [3] The laminae of the thalamus: the layers of thalamus tissue. [4] The lamina propria: a connective tissue layer under the epithelium of an organ. [5] The nuclear lamina: a dense fiber network inside the nucleus of cells. [6]