Plants grow from seeds. Inside each seed is an embryo, or baby plant. The embryo is surrounded by a food storage area. Seeds have a protective outer layer called the seed coat.

Plant roots grow underground and are not seen. Roots help to hold the plant up and bring in food and water from the soil. Food travels up the roots through the stem of the plant. The stem holds up the leaves and flowers on the plant. The leaf is the food-making factory of a plant. Leaves are usually green and contain a substance called chlorophyll. Some plants, but not all, have flowers. Flowers are important in making seeds.