Final answer:
The epiphyseal plate, also known as the growth plate, is located between the diaphysis and the epiphysis of long bones. It is responsible for the lengthwise growth of bones and progresses into an epiphyseal line as bone matures.
Step-by-step explanation:
The epiphyseal plate, also known as the growth plate, is located in the long bones of the body. It is found between the diaphysis and the epiphysis and is responsible for the lengthwise growth of bones. The epiphyseal plate is composed of different zones of cells and activity. As bone matures, the epiphyseal plate progresses to an epiphyseal line, which is the remnant of the plate in a mature bone.