Flat bone grows by Endochondral ossification?
- A. True.
- B. False.
The statement "Flat bone grows by Endochondral ossification" is False.
Flat bones, such as those in the skull, mandible, and clavicle, grow through a process called intramembranous ossification. This process involves the direct conversion of mesenchymal cells (fibroblasts) into bone cells within a membrane, without involving a cartilage intermediate.
In contrast, Endochondral ossification is the process by which long bones grow. It involves the formation of a cartilage model that is gradually replaced by bone tissue. This process is responsible for the lengthening of long bones like the femur, tibia, and humerus.
Here's a table summarizing the key differences:
|
Feature |
Intramembranous Ossification |
Endochondral Ossification |
|
Bone Type |
Flat bones |
Long bones |
|
Precursor Tissue |
Mesenchymal tissue |
Cartilage |
|
Process |
Direct conversion of mesenchymal cells to bone cells |
Cartilage model replaced by bone tissue |
|
Function |
Primarily for bone width & expansion |
Primarily for bone length & growth |
