Engage students with a brief discussion on breathing. Ask them to take a deep breath and notice how their body feels. Introduce the concept of the respiratory system, highlighting the nose, mouth, and lungs.

Explain the basic function of the respiratory system. Use diagrams to show how air travels through the nose and mouth, down the windpipe, and into the lungs.

Introduce the process of breathing in and out, emphasizing the exchange of oxygen and carbon dioxide.

Watch the video 'All About Your Body' to understand how the respiratory system works with other body systems. This video provides a comprehensive overview of the body's systems, supporting a foundational understanding of human anatomy.

Conduct a simple experiment where students blow up balloons to visualize how lungs expand and contract. Discuss how this relates to breathing.

Assign the 'Your Nose, Mouth and Lungs' assessment. This activity involves labeling parts of the respiratory system and explaining their functions, reinforcing the lesson content.

Have students explain the process of breathing in their own words. Encourage them to describe how the respiratory system supports life processes.

Review the key concepts of the respiratory system. Discuss how the nose, mouth, and lungs function together to support the body's needs.

Use the 'What’s Inside Your Body?' assessment to evaluate students' understanding of human anatomy, including the respiratory system.

Encourage students to take the unit quiz to test their comprehension of the respiratory system and its role in the body.