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2007-02-07 14:09:31 · 4 answers · asked by kity1213 1 in Science & Mathematics Biology

4 answers

They can begin as mesenchyme tissue and by intramembranous ossification become bone, or they can begin as cartiliage and by endochondral ossification become bone.

2007-02-07 14:19:48 · answer #1 · answered by wildcat_72069 3 · 2 0

There are two types of bones if you examine their ontogeny.
They are membrane bones and cartilage bones.
Membrane bones are formed on the membranes by the invasion of bone cells called osteoblasts.These cells secrete collagen and calcium phosphate which are laid in the matrix(intercellular space). One example of membrane bone is the partietals of the skull(top of the head).
Cartilage bones are those that are cartilage at first. Cartilage cells(chondroblasts) secrete collagen and chondrotin sulfate in the matrix.Later on they are replaced by osteoblasts that secrete the substances described above.
Bones are connective connective tissue, derived from the embryonic mesoderm.

2007-02-07 23:33:06 · answer #2 · answered by Ishan26 7 · 0 0

Boy, wildcat is smart. Give him the points.

2007-02-07 22:22:23 · answer #3 · answered by ttpawpaw 7 · 0 0

HYALINE CARTILAGE

2007-02-08 00:17:37 · answer #4 · answered by Anonymous · 0 1

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