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Main Parts of Plants

Science, Grade 3

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Study Guide Main Parts of Plants Science, Grade 3

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MAIN PARTS OF PLANTS Parts of Plants A plant has many important parts, such as its roots, stem, leaves, and flower. Roots Each part of a plant has many functions that make it possible for a plant to live. Let’s start with a plant’s roots. • Roots help support the plant by anchoring the plant into the ground. • Roots have tiny hairs that absorb nutrients from the soil, which a plant needs to grow. These roots hairs also take in water from the soil, which a plant needs to live and grow. • Roots of a plant store extra food for the plant too. Lesson Checkpoint: What is one job of the ROOTS of a plant? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Stem Let’s now look at a plant’s stem. • A plant’s stem is used to support the plant. The stem allows the plant’s leaves to reach above the soil so that they may take in the sunshine. • A plant needs sunshine to grow, make food, and live. A plant’s stem carries the water and nutrients that is taken in by the plant’s roots to the rest of the plant. Lesson Checkpoint: What is one job of the STEM of a plant? Leaves Time to investigate the plant’s leaves. Plant leaves have several important jobs to carry out for the plant. • One job is to take in sunshine, which the plant needs to make food and to live. Leaves have small openings in them that allow air and water to enter in and out of the plant. • Leaves contain chlorophyll, which is the green substance that gives the plant its green color and that helps the plant make its own food. Lesson Checkpoint: What is one job of the LEAVES of a plant? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Photosynthesis Plant leaves are the part of a green plant where the plant’s own food is made. The plant makes food through a process called photosynthesis. In photosynthesis, a green plant uses energy from the sun, water it gets from the soil, and the air to make its food. During the process of photosynthesis, the leaves of a green plant take in carbon dioxide, which is what the plant needs to make its own food. Humans and other animals breathe out carbon dioxide, which a plant then takes in through its leaves. Photosynthesis creates food for the plant and at the same time releases oxygen into the air. Lesson Checkpoint: What do plants take in during photosynthesis? Flower Now it is time for the most beautiful part of the plant, the flower! The main job of the flower of a plant is to make seeds. New plants grow from seeds made by other plants. Parts of a Flower There are many important parts of a flower: sepal, petal, the stamen which consists of the anther and filament, and the pistil which consists of the stigma, style, and ovary. Sepals look like small leaves surrounding the bud of a flower. They protect a developing flower before it blooms. The petals of a flower, which are often colorful and scented, attract insects to the flower. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
The stamen of a flower is made up of two main parts: the anther and the filament. The filament is the extremely thin structure that holds up the anther. The anther contains pollen that collects on bees and butterflies that land on the flower that then transfer the pollen to other flowers, which is a necessary part of plant reproduction. Pollen is the fine yellow, powder like substance found on the anthers of a flower. Pollen is needed in order for flowers to reproduce. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
The pistil of a flower is made up of three main parts: the stigma, style, and ovary. The stigma is the sticky part found on top of the pistil. Pollen is collected on the stigma of a flower. The style is the tube-like structure that holds up the stigma on a flower. The ovary of a flower contains seeds and turns into fruit. Lesson Checkpoint: Which part of the flower contains the pollen? © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
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