Compact bone

Function What does bone marrow do? Bone marrow makes nearly all the components of your blood. It's responsible for creating billions of Can you live without bone marrow? Bone marrow makes the components of your blood that you need to survive. Bone marrow produces red blood cells that carry oxygen, white blood cells that prevent infection and platelets that control bleeding. The absence of bone marrow can be fatal since it's an essential part of your body. Can I donate bone marrow? Yes, bone marrow and the healthy cells it produces are necessary for humans to live. Often, cell mutations harm healthy bone marrow cells, and a bone marrow transplant would be a treatment option for people diagnosed with A bone marrow transplant takes healthy cells from a donor and puts them into your bloodstream. The donor’s cells help your body grow healthy red and white blood cells and platelets. Anatomy Where is bone marrow located? There are three parts to the anatomy of your bones: compact bone, spongy bone and bone marrow. Compact bone is the strong, outer layer of your bones. Spongy bone makes up the ends of your bones. Bone marrow is in the center of most bones and in the end of spongy bones in your body. Bone marrow and What does bone marrow look like? Bone marrow is a spongy, soft tissue that resembles a jelly or jam that you would spread on toast. It comes in two colors, red and yellow. Bone marrow fills the cavities of your bones and holds cells that create red and What are the two ...

Article: • • • • • Images: • • Gross anatomy Cortical bone contains Haversian systems (osteons) which contain a central Haversian canal surrounded by osseous tissue in a concentric lamellar pattern. The Haversian canals contain vessels which supply blood to the cellular elements of the osteon (e.g. osteoblasts, osteocytes, and osteoclasts). Two fibrovascular layers surround the cortical bone which contain cells that remain osteogenic. The outermost layer (between the outer surface of the bone and soft tissue) is 1. The thickness of the cortex is from subperiosteal deposition of bone. In children, the periosteal layer loosely adheres to the cortex. The periosteum becomes thicker, vascular, and active with age and increased activity. The periosteum surrounds the cortex except for the portions which are intra-articular, covered by 2. Cortical bone is the most dense tissue, and represents 80% of the total skeletal mass in healthy adults 4. Radiographic features Plain radiograph Cortical bone appears radiopaque (white) on radiographs as the outermost layer of bone. It is best visualized in long bones. The periosteum is not well-visualized on radiographs in the absence of underlying pathology (see DEXA Cortical thickness is measured via 3 at various locations (e.g. lumbar spine, femoral neck, distal radius) to determine bone density and evaluate for bone insufficiency. CT Cortical bone appears radiopaque (white) on computed tomography. Fractures are more easily identified on CT ...

Bone Tissue Definition and Function Walking, running, jumping, and even sitting are only possible because of the structure and strength provided by bone tissue. Bone tissue is one of the strongest tissues in the body, and as such, it plays a big role in supporting other tissues, protecting fragile internal organs from damage, and facilitating movement. Bone tissue is not just an inert material, however. It contains living cells that are constantly working to remodel and repair damage to the tissue. It's also filled with bone marrow, which plays a big role in producing blood cells and other kinds of stem cells. What Are the Two Types of Bone Tissue? Bone tissue is primarily constructed of a protein known as collagen that is also found in other types of connective tissue like cartilage. In bone, collagen fibers are reinforced with calcium phosphate, which is a hard ceramic material that gives bone its strength and stability. When calcium phosphate is added to collagen fibers, the collagen becomes mineralized. Although all bone tissue is made of the same basic materials, the structure of the tissue can be quite different depending on its location. Bone tissue can be classified into one of two types, known as spongy bone and compact bone, based on how the mineralized collagen fibers are arranged within the tissue. Spongy Bone In spongy bone, which is also known as cancellous bone, there are many open spaces that are connected by pieces of bone tissue, giving spongy bone the ap...