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Ch 21: Holt McDougal Biology Chapter 21: Plant Structure & Function

About This Chapter

The Plant Structure & Function chapter of this Holt McDougal Biology Companion Course helps students learn the essential lessons associated with plant structure and function. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Plant Structure & Function textbook chapter.

How It Works:

  • Identify the lessons in the Holt McDougal Plant Structure & Function chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the plant structure and function topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Plant stem composition and functions
  • The definitions of xylem and phloem
  • The purposes of roots and root hairs
  • How roots grow
  • Leaf traits and significance

Holt McDougal is a registered trademark of Houghton Mifflin Harcourt, which is not affiliated with Study.com.

7 Lessons in Chapter 21: Holt McDougal Biology Chapter 21: Plant Structure & Function
Test your knowledge with a 30-question chapter practice test
Structure of Plant Stems: Vascular and Ground Tissue

1. Structure of Plant Stems: Vascular and Ground Tissue

You can determine the age of a tree by looking at its rings. In this lesson, we will look at the basic structures of stems and explore what causes the rings in a tree trunk.

Xylem: The Effect of Transpiration and Cohesion on Function

2. Xylem: The Effect of Transpiration and Cohesion on Function

Roots absorb water and leaves release water, but how does water move up a plant? In this lesson, we will look at how this happens in vascular plants, including the importance of xylem, cohesion and transpiration in the process.

Phloem: The Pressure Flow Hypothesis of Food Movement

3. Phloem: The Pressure Flow Hypothesis of Food Movement

Leaves produce sugars and stems; roots and fruits use these sugars for energy. In this lesson, we will look at how these sugars move throughout vascular plants, including the importance of phloem and the pressure flow hypothesis in the process.

Primary Root Tissue, Root Hairs and the Plant Vascular Cylinder

4. Primary Root Tissue, Root Hairs and the Plant Vascular Cylinder

Roots of plants can provide support, food and water. We will look at diagrams and photos to see the different parts of roots in order to explain these different functions.

Root System Growth: The Root Cap, Primary Roots & Lateral Roots

5. Root System Growth: The Root Cap, Primary Roots & Lateral Roots

It is easy to see some plants get taller, but it is important to know that plants must also have a strong support that we cannot always see. Root growth helps plants survive and can happen in two ways.

The Plant Stem: Function, Types & Parts

6. The Plant Stem: Function, Types & Parts

After completing this lesson, you will be able to explain what a plant stem is, describe the various parts and what they do, and name the two main types of stems. A short quiz will follow.

Structure of Leaves: The Epidermis, Palisade and Spongy Layers

7. Structure of Leaves: The Epidermis, Palisade and Spongy Layers

Leaves may look pretty in the fall when they are changing colors, but they also provide many necessary functions for plants. In this lesson, we will explore the structures and functions of leaves.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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