What is the thin layer of cartilage that separates the diaphysis and epiphyses in growing bones called?

The thin layer of cartilage that separates the diaphysis (the shaft of a long bone) and the epiphyses (the end parts of the bone) during the growth phase is known as the epiphyseal plate. This structure is crucial in the process of bone growth, as it allows for the lengthening of the bone by facilitating the division of cartilage cells. The epiphyseal plate is responsible for the growth in height in children and adolescents, and once the person reaches maturity, this plate fuses and becomes the epiphyseal line, signaling the end of bone growth in length.

Articular cartilage refers to the smooth, white tissue that covers the ends of bones in joints, enabling smooth movement and reducing friction, but it does not separate diaphysis and epiphyses. The periosteum is a dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints, and while it plays a significant role in bone health and development, it does not separate the diaphysis and epiphyses. The endosteum is a thin membrane that lines the inner surface of the bone, specifically the medullary cavity, and is involved in bone growth and repair, but it is not related to the separation between