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Ch 33: Holt McDougal Biology Chapter 33: Protection, Support & Movement

About This Chapter

The Protection, Support & Movement chapter of this Holt McDougal Biology Companion Course helps students learn the essential lessons associated with protection, support and movement. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Protection, Support & Movement textbook chapter.

How It Works:

  • Identify the lessons in the Holt McDougal Protection, Support & Movement chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the protection, support and movement 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:

  • The function and structure of the skeletal system
  • How muscles function in groups
  • The processes of muscle contraction
  • How the epidermal layer provides protection
  • The structure of the dermal layer of skin

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

5 Lessons in Chapter 33: Holt McDougal Biology Chapter 33: Protection, Support & Movement
The Skeletal System: Function and Terms

1. The Skeletal System: Function and Terms

You'll learn about the two major divisions of our skeleton, the axial and appendicular skeleton, in this video lesson. In addition, you will find out how bone is formed, thanks to tiny little cells called osteoblasts and osteoclasts, and what the major parts of a long bone are.

What Is the Muscular System? - Function & How Muscles Work in Groups

2. What Is the Muscular System? - Function & How Muscles Work in Groups

Ever feel overwhelmed when you look at all those muscles in your textbooks? Well, if you do, then maybe learning a little about their anatomy and organization and how they work together will help you sort through it all. In this lesson, learn about the muscle itself and how it works with others to help the muscular system function.

Muscle Contraction: Actin and Myosin Bonding

3. Muscle Contraction: Actin and Myosin Bonding

Muscles contract through the action of two proteins called actin and myosin. In this lesson, you'll learn how actin and myosin filaments, in concert with regulatory proteins tropomyosin and troponin, control your voluntary movements.

The Integumentary System: The Epidermal Layer

4. The Integumentary System: The Epidermal Layer

Do you know what the largest organ in your body is? How about the layers of your skin? Or where skin cancer comes from? Learn the answers to these questions and more in this lesson on the integumentary system.

The Integumentary System: The Dermal Layer

5. The Integumentary System: The Dermal Layer

Did you know that some people don't feel pain? Or that some always feel as if their skin is on fire? Learn about the causes of these diseases and the anatomy of the skin they affect in this lesson- the dermal layer of the skin.

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Other Chapters

Other chapters within the Holt McDougal Biology: Online Textbook Help course

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