epiphyseal plate growth/zones
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10 Terms
1
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epiphysis, diaphysis
zones are number from closer to the ____________ to closer to the _____________
2
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zone of resting cartilage
1st zone, closest to the end of epiphysis
3
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small resting cells, does not actively participate in growth, anchors the epiphyseal plate to the epiphysis
describe cells in the 1st zone
4
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zone of proliferating cartilage
2nd zone
5
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slightly larger (than 1st zone) cells stacked like coins, divide and excrete extracellular matrix
describe cells in the 2nd zone
6
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zone of hypertrophic cartilage
3rd zone
7
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large maturing chondrocytes in columns
describe cells in the 3rd zone
8
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zone of calcified cartilage
4th zone
9
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only a few cells think, dead calcified chondrocytes
describe cells in the 4th zone
10
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osteoclasts remove cartilage and osteoblasts build spongy bone, periosteum lays down compact bone
what happens at the end of the 4th zone