Next come the stems. They're the part of the plant that holds leaves up to the sun for light and makes flowers available for pollination. Stems also carry water and nutrients from the roots to the leaves and then back down again for storage and distribution. The leaf is the part of a plant in charge of making food, a process called photosynthesis. It works like this.
Water is taken in through the roots and transported to the leaves.
The leaves have tiny pores that take in carbon dioxide and spread it to cells that contain chlorophyll. Chlorophyll is a pigment that makes plants green. Sunlight then breaks down the water into oxygen which the plant gives off and we use to breathe. The hydrogen is used with the carbon dioxide to create food for the plant and ultimately food for animals as well. The flowers are an important part of the structure of the plant.