What explains the dramatic acceleration in lengthwise bone growth at puberty?

The dramatic acceleration in lengthwise bone growth at puberty is primarily driven by the surge in sex hormones, particularly estrogen in females and testosterone in males. These hormones stimulate the growth plates in long bones, promoting increased chondrocyte proliferation and subsequent ossification. Additionally, the growth hormone also plays a crucial role in enhancing overall growth during this period. This combination of hormonal changes leads to a significant increase in bone length and overall height during puberty.