Collenchyma is a type of plant tissue that provides support while allowing for flexibility. It is primarily found in young stems, petioles, and leaf stalks. The cells in collenchyma are elongated and have thickened cell walls, which help the plant withstand bending and stretching without breaking. This tissue plays a crucial role in the growth of plants, especially in areas that are still developing. Unlike sclerenchyma, which is rigid and provides more permanent support, collenchyma allows for movement and growth, making it essential for young, growing parts of the plant.