Secondary Growth
Secondary growth explained in an easy to understand way:
Imagine your favorite sweater starting to feel a bit snug as you layer on more clothes during winter. Just like how you add layers to stay warm and sturdy against the cold, plants undergo secondary growth to thicken their stems and roots. In this scenario, the plant is like your body, the additional layers of clothing are comparable to the plant's added layers of cells, and the snug sweater represents the plant's original size expanding outward to accommodate these new layers, resulting in a thicker, more robust structure.
Practice Version
Secondary Growth: Plant growth that thickens stems and roots. Secondary growth. Secondary growth is the process by which plants increase in thickness or girth, primarily through the activity of the vascular cambium.