Vascular cambium is a crucial type of lateral meristem present in the stems and roots of many vascular plants, initiating the process of secondary growth. Functionally, it acts as a ring of dividing cells responsible for generating new plant tissue, thereby increasing the girth of the main plant axis. Internally, the cambium produces secondary xylem, which constitutes the bulk of the wood; externally, it produces secondary phloem, which is vital for transporting sugars. The rhythmic activity of the cambium is responsible for the formation of annual growth rings, which are critical indicators of past environmental conditions and the overall structural support and efficiency of the plant over its lifetime.