b. Cartilage cells die, the matrix degenerates, and that are called lacunae. While compact bone is denser and has fewer open spaces, spongy bone is ideal for making and storing bone marrow within the lattice-like trabeculae network. Four types of cells are found within bone tissue: osteoblasts, osteocytes, osteogenic cells, and osteoclasts (Figure5). A) Serves as model for bone formation B) Provides passageway for blood vessels It is found in most areas of bone that are not subject to great mechanical stress. The cell responsible for bone resorption, or breakdown, is theosteoclast. Inside the diaphysis is the medullary cavity, which is filled with yellow bone marrow in an adult. 1. Blood vessels travel through the harder compact bone to the spongy bone, supplying it with the materials necessary to create blood cells. Direct link to SofiyaMarkova's post for anything that classif, Posted 7 years ago. The lacunae and their accompanying osteocytes are housed in the trabeculae matrix of the bone along with the bone marrow. A) There is blood-forming marrow in most short bones of an adult. So let's take a look inside. spaces appear in the matrix. Red bone marrow fills the spaces between the spongy bone in some long bones. (C) Osteoblasts Direct link to Joanne's post Bone. Like osteoblasts, osteocytes lack mitotic activity. (b) no new cartilage matrix is formed (c) osteoblasts b. PMID: 21626309; PMCID: PMC3127018. Spongy bone is also present in the joints of the body and acts as a shock absorber when we walk, run and jump. (D) cartilage, Ossification occurs in which of the following? 1. Still, most doctors feel that the benefits of bisphosphonates more than outweigh the risk; the medical professional has to weigh the benefits and risks on a case-by-case basis. we're going to be talking about the microscopic structure of bone and in particular, we're To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Spongy bone has a greater surface area than cortical bone but makes up only 20 percent of bone mass. Most bones of the limbs, including those of the fingers and toes, are long bones. Due to the strong nature of compact bone, compared to spongy bone, it is the preferred tissue for strength. (a) mesenchymal cells The hydroxyapatite crystals give bones their hardness and strength, while the collagen fibers give them flexibility so that they are not brittle. Spongy bone is important for a number of reasons. Spongy Bone. If the articular cartilage at the end of one of your long bones were to deteriorate, which is actually what happens in osteoarthritis, you would experience joint pain at the end of that bone and limitation of motion at that joint because there would be no cartilage to reduce friction between adjacent bones and there would be no cartilage to act as a shock absorber. Like compact bone,spongy bone, also known as cancellous bone, contains osteocytes housed in lacunae, but they are not arranged in concentric circles. In addition, blood levels of an enzyme called alkaline phosphatase are typically elevated in people with Pagets disease. They can communicate with each other and receive nutrients via long cytoplasmic processes that extend through canaliculi (singular = canaliculus), channels within the bone matrix. Spongy bone is important for a number of reasons. that cause the matrix to calcify. Spongy bone is also called cancellous or trabecular bone. osteons, trabeculae, bone marrow cavityd.
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