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Subject: Physical Education
Semester: 1
Period: 3
Week: 16
School Name: __________________________
Teacher’s Name: ________________________
Subject: Physical Education
Grade Level: Grade 9
Date: __________________________
Lesson Duration: 45 minutes
Week & Period: Week 16, Period 3
Topic: Respiratory System Anatomy
Sub-topic: Structure and Functions of the Respiratory System
Learning Objectives
By the end of the lesson, students should be able to:
- Identify the major structures of the respiratory system.
- Explain the functions of each part and the mechanics of breathing.
- Describe the role of oxygen in energy production and carbon dioxide removal.
Previous Knowledge
Students already know:
• Circulatory system basics and blood components
• Importance of oxygen transport in the body
Instructional Materials
• Textbook: Physical education textbooks for Grade 9
• Teaching aids: Respiratory system diagrams, models of lungs, balloons for breathing exercises
• Students' notebooks and writing materials
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Activity: The teacher will ask the class:
• Can you describe what happens when you take a deep breath?
• Why do you think athletes focus on breathing techniques during sports?
The teacher will record responses on the board.
Teacher’s Role: Guide discussion, correct misconceptions, and link prior knowledge to the topic.
Learner’s Role:
• Share their understanding of breathing and the respiratory system.
• Respond verbally and participate in warm-up discussion.
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Teacher’s Role:
• Explain the structure of the respiratory system – highlight key components: nose, nasal cavity, pharynx, larynx, trachea, bronchi, lungs, alveoli, and diaphragm. Describe how air travels from the environment to the lungs.
• Describe functions of each part – nose filters and warms air; trachea and bronchi conduct air; alveoli facilitate gas exchange; diaphragm and intercostal muscles drive breathing movements.
• Explain the mechanics of breathing – inhalation (diaphragm contracts, chest cavity expands, air enters lungs) and exhalation (diaphragm relaxes, chest cavity contracts, air exits lungs).
• Discuss the role of oxygen – essential for cellular respiration and energy production; explain removal of carbon dioxide as a waste product.
• Conduct practical demonstrations – observe chest expansion and contraction during breathing; perform simple deep breathing and controlled breathing exercises.
Learners’ Activities (Expanded)
• Observe diagrams, models, or charts to identify structures of the respiratory system.
• Participate in breathing exercises to understand the mechanics of inhalation and exhalation.
• Relate oxygen intake to energy production during physical activity, such as running, jumping, or traditional dance.
• Engage in discussion about how efficient breathing improves endurance and performance in sports and daily tasks.
Assessment Checks:
• Ask learners to name and describe the functions of key respiratory structures.
• Check understanding of inhalation and exhalation mechanics.
• Discuss how oxygen delivery supports energy production and athletic or daily performance.
Notes (Expanded & Detailed):
• Emphasize the relationship between respiratory efficiency and endurance in sports, traditional games, and work activities.
• Include local examples, such as carrying water, running errands, or participating in community sports, to show practical relevance.
• Highlight the alveoli’s role in gas exchange and how this impacts overall health and fitness.
• Encourage learners to reflect on how controlled breathing can enhance both performance and recovery.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary:
• Teacher asks students to recall respiratory structures, functions, and breathing mechanics.
• Learners explain the importance of oxygen and carbon dioxide removal in daily life and exercise.
Evaluation Method (Expanded):
• Exit slip/quiz: Students write short answers to:
• List the major parts of the respiratory system.
• Explain how inhalation and exhalation occur.
• Describe the role of oxygen in energy production.
• Teacher collects and quickly reviews responses; provide oral feedback.
Assignment (Expanded):
Follow-up Activity:
• Measure your breathing rate before and after moderate exercise. Record and explain any differences observed.
Differentiation / Inclusive Strategies
• Struggling Learners: Use simplified diagrams and guided breathing exercises.
• Advanced Learners: Research the effect of respiratory training on athletic performance.
• Students with Disabilities: Participate via assisted observation and verbal responses.
Teacher’s Reflection (After Class)
• What worked well? ______________________________________________________
• What needs improvement? _________________________________________________
• Students’ engagement level: □ High □ Medium □ Low