Definition: Angiosperms, or flowering plants, are the most numerous of all the divisions in the Plant Kingdom. With the exception of extreme habitats, angiosperms populate every land biome and aquatic community. They are a major food source for animals and humans, and are a major economic source for the production of various commercial products.

The parts of a flowering plant are characterized by two basic systems: a root system and a shoot system. These two systems are connected by vascular tissue that runs from the root through the shoot. The flower, a component of the shoot system, is responsible for seed development and reproduction. There are four main flower parts in angiosperms: sepals, petals, stamens, and carpels.