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Cards In This Set
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A disease caused by a vitamin D deficiency in childhood and characterized by overproduction and deficient calcification of osteoid tissue.
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Rickets
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Meaning porous bones a disease that results in decreased bone mass and leads to weakened bones that are prone to fracture.
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Osteoporosis
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Constant dynamic process of continual addition of new bone tissue (bone deposition) and removal of old bone tissue (bone resorption) is a process called?
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Bone remodeling
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A bone increases in diameter as new bone is added to the surface. At the same time, some bone may be removed from the inner surface to enlarge the medullary cavity.
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Appositional Growth
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Remnant of the epiphyseal plate is an internal thin line of compact bone
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Epiphyseal line
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Thin layer of hyaline cartilage that provides for continued lengthwise growth of the bone. located at the boundary between the diaphysis and the epiphysis maintains it thickness during childhood as it is pushed away from the center of the shaft
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Epiphyseal plate
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Zone of resting cartilage this zone is farthest away from the medullary cavity of diaphysis and nearest epiphysis composed of small chondrocytes distributed throughout the cartilage matrix resembles mature and healthy hyaline cartilage. This region secures the epiphysis to the epiphyseal plate
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Zone 1
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Zone of proliferating cartilage. Chondrocytes in this zone I=undergo rapid mitotic cell division enlarge slightly become aligned like a stack of coins into longitudinal columns of flattened lacunae. These columns are parallel to the diaphysis.
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Zone 2
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Zone of hypertrophic cartilage. Chondrocytes cease dividing and begin to hypertrophy (enlarge in size) in this zone. The walls of the lacunae become thin because the chondrocytes resorb matrix as the hypertrophy.
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Zone 3
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Zone of calcified cartilage. This zone usually is composed of 2 to 3 layers of chondrocytes. Minerals are deposited in the matrix between the columns of lacunae; this calcification destroys the chondrocytes and makes the matrix appear opaque.
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Zone 4
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Zone of ossification. (Bone) The walls break down between lacunae in columns, forming longitudinal channels. These spaces are invaded by capillaries and osteoprogentior cells from the medullary cavity. New matrix of bone is deposited on the remaining calcified cartilage matrix.
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Zone 5
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Interstitial Growth exhibits five continuous zone 1-4 are? cartilage and the 5 is bone list them in
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1 Zone of resting cartilage2 Zone of proliferating cartilage3 Zone of hypertrophic cartilage4 Zone of calcified cartilage5 Zone of ossification
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The formation and development of bone connective tissue
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Ossification or osteogenesis
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The process of endochondral ossification of a long bone
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Step 1 Fetal hyaline cartilage model developsStep 2 Cartilage calcifies, and a periosteal bone collar forms around diaphysisStep 3 Primary ossification center forms in the diaphysisStep 4 Secondary ossification centers form in the epiphysesStep 5 Bone replaces cartilage, except the articular cartilage and epiphyseal plate.Step 6 Epiphyseal plates ossify and form epiphyseal lines.
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The process of Intramembranous ossification of a flat bone
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Step 1 Ossification centers form within thickened regions of mesenchyme.Step 2 Osteoid undergoes calcificationStep 3 Woven bone a d surrounding periosteum form.Step 4 Lamellar bone replaces woven bone as compact and spongy bone form.
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