Interstitial growth

Interstitial growth refers to the process by which cartilage and some other tissues grow from within. This occurs when cells called chondrocytes divide and produce new matrix material in the spaces (interstitium) between existing cells. As these cells multiply and create new matrix, the tissue expands, allowing for growth in size. This type of growth is important in the development of certain body parts, particularly during childhood, as it contributes to the lengthening of bones and the formation of cartilage structures. Unlike appositional growth, which adds layers to the surface, interstitial growth allows for internal expansion.