In compact bone the microscopic units are arranged in tightly packed parallel columns with very little space intervening (10% porosity), creating the illusion of a solid mass. This type of bone forms the outer shell of the skeletal elements and thus often is referred to as cortical bone. Cortical bone provides the strength to resist weight-bearing forces in the long bone. In contrast, spongy bone is composed of irregularly branching trabecular (struts or plates) surrounded by a great deal of space (50-90% porosity). Spongy bone is located in the epiphyseal ends of long bones and predominates in short and irregular bones of the skeleton. The open array of spicules/trabeculae serves to distribute forces from the joint surface to the diaphyseal cortex and permit a certain degree of deformation for shock and absorption.
The composition of bone consists of cells including osteoblasts, osteocytes, and osteoclasts, bone lining cells, the extracellular matrix, and the periosteum and endosteum. Osteoblasts are derived from osteoprogenitor cells, which are like stem cells for the bone, which are mesenchymal in origin. The fully differentiated osteoblasts produce and secrete the organic components or proteins of the matrix (collagens, proteoglycans, and glycoproteins) called osteoid. Since these are gene products, they need protein producing machinery to complete their function. Once the cell is surrounded by osteoid, the matrix mineralizes (the exact trigger for mineralization is still under investigation) and the osteoblast advances to the next maturity level, the osteocyte. They initiate mineralization of osteoid material, possibly by modulating electrolyte fluxes between the extracellular fluid volume and osseous fluid. Osteoblasts are in contact with one another and with mature osteocytes through cellular processes. Contact is maintained following mineralization. Histologically, osteoblasts appear basophilic due to the high concentration of rough endoplasmic reticulum.
Rule of the Bone can be divided into three distinct sections. ... The development of Bone is most evident right here. ... It corrupted Doc, and Bone could end up the same way. This is the reason Bone decides to return to America. ... Bone's time in Jamaica is what really defines his life. ...
- The humerus is a long bone, the occipital is a flat bone, and the vertebrae is an irregular bone. ... Describe the structure and function of this type of bone. - The cavity of the vertebral body mainly consists of cancellous bone (spongy bone) tissue surrounded by a outer protective layer of compact bone. ... Spongy bone most of the time has red bone marrow where blood cells are produced. ... What type of bone makes up the majority of the diaphysis of long bones like the humerus? ... The bone during this process is remodeled to match the bone before the break. ...
Bone, a punk living in upstate New York, had finally found a safe place to settle in after running away from his abusive stepfather and oblivious mother. ... He couldn't let Bone, the boy he"d made to feel like nothing since the very beginning, see him in this state. ... It's apparent to Bone now that the only way he can possibly live with his mother again is if Ken is out of the picture forever. ... After this, Bone knew that his only real home was with I-Man, who, upon his return, was preparing to leave for Jamaica. Bone goes with him to see him off, but ends up buying a ticket ...
Introduction After the shocking discovery of a skeleton in a park, we are here to analyze the remaining bones to find the identity of the deceased person. ... We concluded this data by examining the Femur, Humerus, and Pelvis and comparing the bones to qualitative and quantitative data. ... Other methods that can be completed by the FBI is Bone marrow aspiration and DNA analysis. Bone marrow aspiration is a procedure used to collect and evaluate bone marrow. ... The Tibia was not recovered so we could not measure that bone. ...
Bone Marrow and Peripheral Blood Stem Cell Donation Bone marrow and peripheral stem cell donation is very essential to many people's lives. ... Bone marrow, according to www.bmtnews.org, is a spongy tissue found inside bones. ... The difference between the other two is that an allogeneic transplant is when the receiver of the bone marrow gets the bone marrow from a twin. ... For the donation of bone marrow, the physicians surgically take a part of the bone marrow from the back of the donors pelvic bone. ... The donor may experience bone pain for a while but it should calm down after abou...
AbrahamVan Brunt, known as Brom Bones, is Ichabod rival. ... Bones always had his eye on Katrina, but he notices that he is not the only one. He sees that Ichabod is trying to talk to her and Bones does not tolerate that. ... Bones went to Ichabod's school and messed everything up. ... Every girl wants to have a night shining armor and Brom Bones is the answer. ...
There are the long bones, short bones, flat bones, irregular, and the sesamoid. ... Flat bones are found in the cranium or the scapula and are sandwiches of spongy bone amid two layers of compact bone and are usually curved. Irregular bones are any bones that don't fit these arbitrary categories (bones of the face, vertebrae). ... The compact form of the bone is the solid part on the outside of the bone, and the cancellous form appears spongy and is on the ends of the bone inside the compact bone, supporting the end of the bone and transferring weight from the bone ends to the b...
