Bone Growth and Closure of Epiphyseal Plate

How does bone growth occur in long bones?

Options:

A. Through cartilage cell division

B. By forming a structure called epiphyseal line

C. By fusing the epiphysis and diaphysis

D. All of the above

Answer:

The correct answer is D. All of the above.

Bone growth in long bones occurs through a process that involves cartilage cell division, the formation of the epiphyseal line, and the fusion of the epiphysis and diaphysis. This process allows for longitudinal bone growth and the eventual closure of the epiphyseal plate.

During bone growth, cartilage cells in the epiphyseal plate proliferate and form new cartilage, which is eventually replaced by bone tissue. This process of bone replacing cartilage allows for the elongation of the bone.

As bone growth continues, the epiphyseal plate gradually closes, and the epiphysis fuses with the diaphysis. This fusion results in the formation of the epiphyseal line or remnant, marking the end of longitudinal bone growth in long bones.

Therefore, bone growth in long bones involves a complex process that includes cartilage cell division, the formation of the epiphyseal line, and the fusion of the epiphysis and diaphysis.