Lung Dissection

Students explore the structure and function of lungs by dissecting real animal specimens. They observe the spongy texture, identify the trachea, bronchi, and blood vessels, and can inflate the lungs with a pump to see how they expand and contract during breathing.

• Follow instructions provided in the links below.

Lungs dissection - GCSE science - Alistair Rollinson:

Lung Dissection - Glasgow Science Centre:

📄 Dissecting lungs - Nuffield Foundation: https://practicalbiology.org/cells-to-systems/ventilation-systems/dissecting-lungs

• Attach rubber tubing to the trachea and inflate the lungs using a hand or foot pump. Observe inflation and deflation inside a plastic bag to contain aerosols.
• If present, test the larynx by forcing air through it and listening for sounds.
• Compare lungs from different animals to study structural differences.

• Use gloves, scalpels, and scissors carefully to avoid cuts.
• Wear eye protection when cutting cartilage or handling preserved specimens.
• Do not blow into the lungs directly; use tubing and a pump to avoid inhaling contaminated air.
• Place lungs in a plastic bag before inflating to contain aerosols.
• Wash hands thoroughly with soap and warm water after handling specimens.
• Disinfect benches, tools, and trays after use.
• Dispose of animal material appropriately (incineration or designated waste bins).

• What features of the trachea help keep the airway open? (cartilage hoops prevent collapse but allow flexibility)
• How do arteries and veins differ in structure? (arteries have thicker, elastic walls; veins have thinner walls)
• Why does lung tissue float in water? (air remains trapped in the spongy alveolar structure)
• What does inflating the lungs show about their function during breathing? (lungs expand and recoil due to elasticity)
• How does the larynx produce sound? (air passing over vocal cords causes vibrations, producing noise)
• What are the ethical considerations of using animal lungs in the classroom?