Begin the lesson with an engaging question: 'Have you ever wondered how your body moves when you run or wave?' This will capture students' interest and introduce the concept of the muscular system working with the skeletal system.

Explain the collaboration between the skeletal and muscular systems in facilitating body movement. Discuss the three main types of muscles: smooth, cardiac, and skeletal, and their respective functions.

Introduce the concept of voluntary and involuntary muscles with examples of each.

Watch the video 'All About Your Body' to understand how different body systems, including the muscular system, work together. This video provides a comprehensive overview of body systems, enhancing students' understanding of anatomy.

Engage students in a discussion about how muscles work in pairs to create movement, emphasizing contraction and relaxation.

Conduct a simple experiment where students can observe muscle contraction and relaxation by bending and straightening their arms. This practical activity helps students visualize how muscles work in pairs.

Have students complete the 'The Muscular System' assessment to reinforce their understanding of muscle types and their roles in body movement. This assessment encourages students to apply their knowledge in identifying muscle use in daily actions.

Ask students to explain the difference between voluntary and involuntary muscles and provide examples of each. This activity checks their comprehension of the lesson content.

Review the key concepts of the lesson by summarizing the roles of smooth, cardiac, and skeletal muscles. Encourage students to reflect on how these muscles contribute to their daily activities.

Use the 'Human Body Organs' assessment to evaluate students' understanding of organ functions and their ability to relate anatomical structures to their roles in the body.

Encourage students to take the unit quiz to test their comprehension of the muscular system and its functions.