There are no wandering mast cells plasma cells in this matrix It relies on O 2

There are no wandering mast cells plasma cells in

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There are no wandering mast cells plasma cells in this matrix. It relies on O2from blood vessels outside of it. It doesn’t heal well! Elastic cartilage is foundin the ears and epiglottis, and fibrocartilage is found in discs. The purposes of the skeletal system are to support soft tissue, protect delicate structures (brain and heart), function as a lever, storage of minerals (Ca2+and PO4) and fat (yellow bone marrow), and it has a lot to do with the making of blood cells, hemopoiesis. Bone can only move if properly attached to tendons or ligaments that are attached to muscle. It hasno ability to move on its own. Parathormoneand Calcitonincontrol the
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levels of calcium and phosphate fibrous CT. The articular cartilagegets with the cartilage above it to form a joint. All articular cartilage is hyaline cartilage. To articulate means to put together. The medullary cavityis the middle space, but it isn’t empty! There is spongy bone in it formed as trabeculae. Surrounding the trabeculae is yellow bone marrow. The epiphysisis the end of the bone. The endosteumis a layer of osteoblasts, which make cells, and osteoclasts, which destroy/break down cells. Both cellsneed to be represented because bone is constantly being whittled and replaced. The periosteumcovers all of the bone except the cartilage. The outer layer is made of fibrous CT that has nerves and a blood supply. The inner of the periosteum layer is the osteocytic membrane, which has osteoblasts and osteoclasts in it as well. The closer the end of a bone is to the midline of the body and the head, the more likely it is to be red blood marrow. The osteonis the basis of compact bone. There is a central canal where the blood supply is. Lamellaeare the layers of the osteon. They are concentric lamellae because the multiple rings go around the center. Lacunae are the spaces in compact bone where osteoblasts are found. Canaliculiare the extensions of lacunae. They are close together, so they can communicate with each other. The lacunae are filled with ECF and the spaces have collagen fibers, which come from the osteoblasts, which put them in the space and deposit minerals on top of them. Volkmann’s canalbrings blood into the center of the bone from the blood vessel in the outer layer of the periosteum along with cells that help you increase in size and help you make spongy bone. Compact bone is dynamically alive due to the tremendous blood supply. Need a good infrastructure mesh of collagen fibers
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and mineral supply between osteoclasts. The minerals from the blood supply deposit on top of the wire mesh making bones firm. Bone mends itself fast, unlike hyaline cartilage which is avascular and therefore does not mend on its own. Many scientists classify bones based off of their shape, but they should be classified by their origin or the way they were formed. There are two ways that bones are formed. Endochondral formationof bone uses hyaline cartilage as a template. The cartilage is just living and is covered by its perichondrium. The way you know that the cartilage is about to turn into
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