BONE
DEVELOPING BONE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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During intramembranous ossification, which of the following is the second step:
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osteoblasts lay down osteoid and it undergoes calcification
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woven bone and surrounding periosteum form
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lamella bone replaces wove bone as compact and spongy bone form
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ossification centers form with mesenchyme (that differentiates into osteoblasts)
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Explanation:
Detailed explanation-1: -Intramembranous Ossification. During intramembranous ossification, compact and spongy bone develops directly from sheets of mesenchymal (undifferentiated) connective tissue. The flat bones of the face, most of the cranial bones, and the clavicles (collarbones) are formed via intramembranous ossification.
Detailed explanation-2: -During the second phase of endochondral ossification, the committed mesenchyme cells condense into compact nodules (Figure 1B). These inner cells become committed to generating cartilage, and the outer cells become committed to becoming bone.
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