what is the difference between primary and secondary ossification centers?
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There are two types of ossification centers – primary and secondary. A primary ossification center is the first area of a bone to start ossifying. It usually appears during prenatal development in the central part of each developing bone. ... In long bones, the secondary centers appear in the epiphyses.
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What is the difference between primary and secondary reinforcers? Primary reinforcers are reinforcers that meet a biological need such as food and shelter. While Secondary reinforces gain value by association with primary reinforcers. .
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Calcification is often confused with ossification. Calcification is synonymous with the formation of calcium-based salts and crystals within cells and tissue. It is a process that occurs during ossification, but not necessarily vice versa.
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['Zone of reserve cartilage. ... ', 'Zone of cell proliferation. ... ', 'Zone of cell hypertrophy. ... ', 'Zone of calcification. ... ', 'Zone of bone deposition.']
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Difference between Primary storage and secondary storage. Primary memory is the main memory (Hard disk, RAM) where the operating system resides. Secondary memory can be external devices like CD, floppy magnetic discs etc. secondary storage cannot be directly accessed by the CPU and is also external memory storage.
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Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.
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In botany, secondary growth is the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken, while primary growth is growth that occurs as a result of cell division at the tips of stems and roots, causing them to elongate, and gives rise to primary tissue.
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The main difference between epiphysis and diaphysis is that epiphysis is the rounded end of a long bone, at its joint with adjacent bone(s), whereas diaphysis is the main or midsection (shaft) of a long bone. ... Epiphysis, metaphysis, and diaphysis are three different parts of a long bone.
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The key difference between secondary oocyte and ovum is that secondary oocyte is an immature egg cell that is formed after the first meiotic division while ovum is the mature gamete that is formed after the second meiosis division.
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The key difference between primary and secondary valency is that primary valency is the oxidation state of the central metal atom of a coordination complex whereas secondary valency is the coordination number of the central metal atom of a coordination complex.
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The principal difference in primary and secondary treatment is the process that breaks down the sewage in wastewater. ... The initial and primary water treatment process removes large matter from wastewater while the secondary treatment will remove smaller particles already dissolved or suspended.
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Osteocytes are mature bone cells, whereas osteoblasts are bone forming cells and osteoclasts are bone-resorbing cells.
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In intramembranous ossification, bone develops directly from sheets of mesenchymal connective tissue. In endochondral ossification, bone develops by replacing hyaline cartilage. Activity in the epiphyseal plate enables bones to grow in length. Modeling allows bones to grow in diameter.
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Primary osteoarthritis (715.1x), also known as idiopathic, affects joints of one site with no known cause. Secondary osteoarthritis (715.2x) affects a joint of one site and is due to some external or internal injury or disease.
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During development, tissues are replaced by bone during the ossification process. In intramembranous ossification, bone develops directly from sheets of mesenchymal connective tissue. In endochondral ossification, bone develops by replacing hyaline cartilage. ... Appositional growth allows bones to grow in diameter.
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The main difference between secondary-progressive MS (SPMS) and primary-progressive MS (PPMS) centers on the presence or absence of relapses. SPMS develops in patients who initially had relapsing-remitting MS (RRMS) as a secondary phase of that disease course.
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Primary bone. Primary bone is the first bone tissue that appears in embryonic development and in fracture repair. ... The secondary bones have lower amounts of osteocytes so primary bone is much more easily penetrated by x-ray.