Apd, Bone Formation And Development

Front 1

The human embryo begins the process of ossification at

Back 1

during the 8th week

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Bones are made up of three different cells:

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Osteoblasts
Osteocytes
and Osteoclasts

Front 3

Bone formation is called

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Ossification

Front 4

Bone formation begins when

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Osteoblasts appear in the body.

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blank secrete an organic matrix into which bone salts are deposited to initiate the process of calcification (hardening).

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Osteoblasts

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The matrix in which young bone is formed, as well as the young bone itself that is created, is called

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Osteoid (resembling bone)

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When the osteoblasts are finally surrounded by this matrix, they become

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osteocytes (former osteoblasts)

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Osteoblasts continue to

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form imature bone while bone growth and development ensures that imature bone is replaced by mature bone.

Front 9

Replacement of bones occur

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when osteoclasts attach themselves to immature bone, dissolve it, and then reabsorbit.

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Matrix is when

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replacement occures, this process is a constant turnover of bone matrix, which results in the modeling of the bone.

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Bone cells

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Cells the body has programmed to create bones

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Immature bone

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The first formation of bone

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Mature bone

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Bone that has ossified and calcified

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Ossification

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Bone formation

Front 15

Osteoblasts

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Bone-forming cells that secrete a matrix which becomes calcified

Front 16

osteoclasts

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Large multinucleated cells that resorbe bone matrix

Front 17

Osteocytes

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Former osteoblasts that are surrounded by bone matrix and have calcified