Which tissues are responsible for the plant's flexibility?

Collenchyma is a type of simple tissue found in the aerial parts of plants, such as leaves, stems, and flower stalks. Collenchyma cells have thick cell walls that are unevenly thickened, particularly at the corners where the cells meet. This uneven thickening of the cell walls allows for flexibility and mechanical support, which is important in supporting the plant's growth and development.

Collenchyma tissues are often found in regions of the plant that are undergoing active growth or experiencing mechanical stress, such as the outer layer of herbaceous stems, the midribs of leaves, and the fruit stalks of some fruits. They provide support while allowing for some degree of flexibility, which is particularly important in wind-pollinated plants that need to bend and sway in the wind.