Broadly, plants have two organ systems: A) the root system and B) the shoot system.A typical diagram of a plant body consists of three parts: 1) roots, 2) stems, and 3) leaves, each having specialized functions. Apart from these basic parts, a flowering plant also contains 4) flowers and 5) fruits.The root system covers the underground parts of a plant, which include the roots, tubers, and rhizomes, whereas the shoot system consists of parts found above the ground, such as leaves, stems, flowers, and fruits.1. RootsIt is the part that lies below the surface of the soil. The top part of a root (root apex) is covered by a covering known as root cap.FunctionsAbsorbing water and minerals from the soilStoring food for future useProducing plant growth hormonesAnchoring the plant firmly to the soil and providing supportDeveloping new plants from the roots of the old plant (vegetative reproduction)2. StemsThey are found above the ground and are structurally divided into nodes and internodes. The regions where leaves are found are known as nodes, whereas the areas in-between the nodes are called internodes.3. LeavesThey are mostly found above the ground and attached to the stem. A leaf consists of three main parts: i) the petiole, ii) leaf base, and iii) lamina or leaf blade.FunctionsMaking food for the plant with the help of sunlight, carbon dioxide, and water through photosynthesisHelping in reproduction such as in Bryophyllum, a group of sprout leaf plantsHelping in evaporation from the aerial parts of the plant by transpirationApart from these main functions, leaves of some plants are modified to form tendrils, that help in climbing (e.g., pea plant) or spines, helping in protection (e.g., cactus). Some leaves may turn fleshy to store food (e.g., onion plant).