2007-02-02 12:27:24 · 3 answers · asked by -yondaime- - 1 in Science & Mathematics ➔ Biology
osteocytes (bone cells) and cartilage.
2007-02-02 12:53:09 · answer #1 · answered by hptz1000 5 · 0⤊ 0⤋
Bones start out in very immature organisms as cartilage- basically cells surrounded by a firm matrix of protein. As bones develop these cells sequester calcium and phosphorous, which results in the bones getting harder and stronger. In a juvenile organism the bones are completely ossified except for cartilagenous growth plates. When the organism matures, even these plates will harden, resulting in mature bone.
2007-02-02 12:35:58 · answer #2 · answered by datamonkey0031 2 · 0⤊ 0⤋
well...what is bone? it starts out as ossification tissue that grows around preexisting cartilage. ... then ostecytes (bone formers) come in and grow... the osteoclasts (bone eaters) come in and "eat out" a hollow caity in the middle..the medullary cavity.... but what makes up the bone? well.. calcium salts make up "haversian systems" which house the blood vessels and nerve endings that go into bone. ... the spongy bone of the epiphyses.. the ends or Heads of the bone.. hold the yellow marrow and the hollow cavity in the middle of the bone holds the red marrow.. ... so all bone is ... are calcium salts and organic matrx..
2007-02-02 12:54:58 · answer #3 · answered by lil miss agony 3 · 0⤊ 1⤋