Which zone is associated with rapid proliferation of cartilage cells?

Which zone is associated with rapid proliferation of cartilage cells?

• A. Ossification Zone
• B. Calcification Zone
• C. Proliferation Zone
• D. Hypertrophic Zone

Answer: (C)

In the growth plate, elongation of long bones happens as chondrocytes divide in a specific region. The zone of proliferation is where these cartilage cells multiply rapidly and line up in columns, actively adding cartilage and driving lengthwise growth. This rapid cell division distinguishes it from neighboring zones: the hypertrophic zone where cells enlarge, the calcification zone where the matrix calcifies and cells die, and the ossification zone where bone forms. So, the zone associated with rapid proliferation of cartilage cells is the proliferation zone.

In the growth plate, elongation of long bones happens as chondrocytes divide in a specific region. The zone of proliferation is where these cartilage cells multiply rapidly and line up in columns, actively adding cartilage and driving lengthwise growth. This rapid cell division distinguishes it from neighboring zones: the hypertrophic zone where cells enlarge, the calcification zone where the matrix calcifies and cells die, and the ossification zone where bone forms. So, the zone associated with rapid proliferation of cartilage cells is the proliferation zone.