Parts of a Plant describes the key components of plants. It explains that plants need sunlight, air, water and nutrients to grow. The main parts of a plant are the roots, which take in water and nutrients; the stem, which holds up the plant and transports water and nutrients; and leaves, which use sunlight to make food through photosynthesis. Flowers produce fruits containing seeds, which can be scattered by wind, water, animals or planting to form new plants.