Which bone-forming process is responsible for the development of most flat bones, such as those of the skull?

• A. Bone remodeling
• B. Intramembranous ossification
• C. Endochondral ossification
• D. Appositional growth

Answer: (B)

Verified step by step guidance

1. Understand the types of bone formation processes: Intramembranous ossification and Endochondral ossification are two primary methods of bone development. Intramembranous ossification is responsible for forming flat bones, while Endochondral ossification forms most long bones.
2. Recognize the characteristics of flat bones: Flat bones, such as those in the skull, are typically formed directly from mesenchymal tissue without a cartilage precursor, which is a hallmark of Intramembranous ossification.
3. Learn the process of Intramembranous ossification: Mesenchymal cells differentiate into osteoblasts, which secrete osteoid (unmineralized bone matrix). The osteoid then mineralizes to form bone tissue.
4. Compare Intramembranous ossification to Endochondral ossification: Endochondral ossification involves a cartilage model that is replaced by bone, which is not the process used for flat bones like those of the skull.
5. Conclude that Intramembranous ossification is the correct answer: Based on the characteristics of flat bones and the direct formation of bone tissue from mesenchymal cells, Intramembranous ossification is responsible for the development of most flat bones.