the answer your looking for is a cell wall.
The Stem
A grass plant typically consists of a root system, stem, leaves, and flowers or inflorescence. The root system provides stability and absorbs water and nutrients from the soil, while the stem supports the leaves and flowers. Leaves are the primary site for photosynthesis and the production of carbohydrates, while flowers or inflorescences are responsible for reproduction and seed production.
flowers an leaves
A Cactus - it has a modified stem which produces flowers, but no leaves.
The plant stem has two functions. The plant stem supports the leaves and flowers. The plant stem also transports water and food to the plant.
A Rose has leaves and flowers.
The shoot system of a plant includes all the above-ground structures, primarily the stems, leaves, and flowers. The stem supports the plant and transports nutrients and water between the roots and leaves. Leaves are the primary sites for photosynthesis, capturing sunlight to convert carbon dioxide and water into energy. Additionally, flowers are involved in reproduction, facilitating pollination and seed production.
Usually stems hold flowers, leaves, and fruit on plants.
They are modified leaves
Determinate growth occurs when leaves and flowers grow to a set size.
A "stem" is a part of a plant. It is a vascular structure that supports heaves or flowers and connects these to the roots of the plant. It also sends the sugar that the plant makes up to the leaves for photosynthesis
Above ground system in plants consists of stem, leaves and flowers.