Final answer:
Secondary Ossification Centres are regions in the epiphyses of long bones that transform cartilage into bone postnatally, aiding in the growth of the bone ends and playing a role in the overall maturation of the skeleton until adolescence.
Step-by-step explanation:
The Secondary Ossification Centre is a region of bone development located in the epiphyses of long bones. It plays a crucial role in bone maturation by converting hyaline cartilage into spongy bone. This process occurs as blood vessels and osteoblasts infiltrate these areas postnatally. The appearance of secondary ossification centers signals the ongoing growth of the bone as they contribute to the formation of the bone ends. The primary and secondary ossification centers are separated by a layer of hyaline cartilage, known as the epiphyseal plate or growth plate, which is responsible for the longitudinal growth of the bone during an individual's development until skeletal maturity is reached in adolescence.