Diagram pack
Lungs and Breathing
Bronchi, alveoli, and the path of air in and out — connect to exercise and asthma awareness.
Lungs exchange oxygen and carbon dioxide at alveoli.
Content quality
Content quality
- Quality
- School-ready
- Review
- Review approved
- Age suitability
- Upper secondary
- Safety
- Use with supervision
- License
- Original content
Simplified educational model. For learning and practice only — not professional-grade medical, engineering, or electrical documentation.
Teacher note: Simplified educational diagram, not medical advice. Use with teacher guidance in class.
Last reviewed: 5/1/2026 · Next: Review before embedding external OER figures.
- Simplified educational model. For learning and practice only — not professional-grade medical, engineering, or electrical documentation.
- Simplified educational diagram, not medical advice. Use with teacher guidance in class.
Curriculum alignment
Aligned for classroom support — not official national syllabus certification.
Cameroon · O Level · Biology · Breathing and gas exchange · GCE O Level
Cameroon · Anglophone / Francophone schools
O Level · Biology · Breathing and gas exchange · GCE O Level
Mapped to common school topics — aligned for classroom support, not official syllabus certification.
International · General STEM
O Level · Biology · Breathing and gas exchange
Global STEM foundation support for diagrams and practice.
What you will understand
Lungs exchange oxygen and carbon dioxide at alveoli.
What you will draw
Branching airways inside both lungs.
What you will write
Inhalation, exhalation, alveoli, diaphragm.
Where you will use it
Asthma inhalers, altitude training, and singing all involve breath control.
Key vocabulary
- Trachea
- Bronchi
- Alveoli
- Diaphragm
- Inhalation
- Exhalation
Flow stages
- 1
Thorax outline
Draw rib cage and two lungs.
- 2
Airway tree
Trachea splitting to bronchi.
- 3
Gas exchange
Alveoli and capillary contact.
Drawing steps
Drawing steps
- Outline lungs
- Add trachea and bronchi
- Show alveoli clusters
- Arrow air in and out
Application
Flow
- Nose → trachea → bronchi → alveoli → blood
Real-life application
- Why do we breathe faster when running?
Common mistakes
Common mistakes to avoid
- Single sac instead of branching
- Missing diaphragm