Construct a Lung Model


To understand the mechanism of breathing through constructing a lung model and be able to answer the question, “What parts of the respiratory aids in breathing?”

Additional information

Humans need the oxygen in the air they breathe. Oxygen is needed to burn the food taken in. In order for the body to get a constant supply of oxygen and regularly remove carbon dioxide, you inhale and exhale air through the process of breathing. The parts that work together to help you breathe make up your respiratory system. When you breathe in, air is drawn into the lungs through the respiratory passage. The gaseous exchange occurs in the lungs. The lung is a sponge-like, cone shaped organ composed of three lobes and separated by pleural membranes. Through it, oxygen diffuses into the blood and for the cells to use. Carbon dioxide is then released by the body.

Sponsored Links

Required materials

  • clear plastic
  • cylindrical plastic bottle
  • plastic Y-tube
  • modeling clay
  • small ice bag
  • big rubber balloon
  • two rubber bands
  • adhesive tape
  • scissors
  • string

Estimated Experiment Time

Approximately 30 minutes

Step-By-Step Procedure

  • 1. Cut the bottom of the plastic bottle with a scissors.
  • 2. Cut the two ice bags to about 2.5 centimeters in length.
  • 3. Tie one ice bag to each end of the Y-tube using rubber bands.
  • 4. Carefully insert the Y-tube through the small opening made at the center of the plastic bottle.
  • 5. Hold it in place by using modeling clay and to prevent air from entering or leaving.
  • 6. Cut the balloon into two and use the part with the tip where you blow air into the balloon.
  • 7. Stretch the balloon sheet under the open bottom of the bottle.
  • 8. Use big rubber hands to hold it in place.
  • 9. Tie a string at the middle of the stretched balloon sheet.
  • 10. Pull the balloon and observe how the plastic bags attached to the Y-tube change in shape.


Be careful in handling sharp objects like the scissors. Make sure that you tie the rubber bands tightly in places where you need them.


What do the parts of the model represent? What happens when you push and pull the balloon? How do these movements affect the plastic bags? In respiration, what do these movements represent?


In this model, the stretched rubber balloon sheet represents the diaphragm; the plastic bags represent the lungs, and the Y-tube, the respiratory passageway. When you push and pull the balloon, the plastic ice bags also inflate and deflate. The muscular diaphragm moves when you breathe in and out. It is pulled flat when you breathe in. At the same time, the muscles between the ribs contract and pull the rib cage upward and outward. This action increases the volume of your chest. This allows the lungs to expand and suck in air. When you breathe out, the chest muscles and diaphragm relax. This causes the lung and the rib cage to expel air.

Sponsored Links

Take a moment to visit our table of Periodic Elements page where you can get an in-depth view of all the elements, complete with the industry first side-by-side element comparisons!

Your email:
Your name:
Recipient email:
Recipient name:

Print this page   Bookmark this page  

Hide/View all projects Hide all projects Hide/View all projects

All Projects List

  • Accelerate Rusting
  • Acids And Bases
  • Additive Colors
  • Ant Microphotography
  • Apple Mummy
  • Balloon Rocket Car
  • Barney Banana
  • Bending Water
  • Bernoulli’s Principle
  • Blind Spot in Vision
  • Boiling Point of Water
  • Build an Electromagnet
  • Build an Inclinometer
  • Caffeine And Typing
  • Candle Race
  • Candy Molecules
  • Capillarity of Soils
  • Carbon in the Atmosphere
  • Checking vs. Savings
  • Chemical Metamorphosis
  • Clean Cleaners
  • Cleaning Oil Spills
  • Climbing Colors
  • Cloud Cover
  • CO2 & Photosynthesis
  • Collecting DNA
  • Colorful Celery
  • Coloring Matter in Food
  • Colors And Temperature
  • Composition of a Shell
  • Computer Passwords
  • Construct a Lung Model
  • Corrosiveness of Soda
  • Create a Heat Detector
  • Create Lightening
  • Cultivate Slime Molds
  • Cup of Lava
  • Dehydrated Potato
  • Desalinate Sea Water
  • Detergents and Plants
  • Dissolving in Liquids
  • Dissolving Solutes
  • Distillation of Water
  • Double Color Flower
  • Egg in a Bottle
  • Enzyme Activity
  • Eroding Away
  • Erosion Simulator
  • Evaportating Liquids
  • Expanding Soap
  • Exploding Ziploc
  • Extracting Starch
  • Fans And Body Temp
  • Fertilizer & Plants
  • Filtration of Water
  • Floating Ball Experiment
  • Floating Balloon
  • Fog Formation
  • Font and Memory
  • Food and Academics
  • Friction And Vibration
  • Fruit Battery Power
  • Full and Low Fat Foods
  • Galileo's Experiment
  • Gas To Liquid
  • Grape Juice & Cleaners
  • Gravity and Plants
  • Green Slime
  • Growing a Crystal
  • Growing Bread Mold
  • Growing Population
  • Haemoglobin Binding
  • Hard vs. Soft Water
  • Homemade Floam
  • Home-made Geodes
  • Home-Made Glue #1
  • Homemade Snowflakes
  • Home-made Stethoscope
  • Homemade Volcano
  • Homemade Windmill
  • Human Battery Power
  • Inertia of an Egg
  • Information and CD’s
  • Invisible Ink
  • Isolation of Bread Mold
  • Isolation of DNA
  • Jar Compass
  • Lemon Floaties
  • Levers And Force
  • Lift an Ice Cube
  • Light Colors and Plants
  • Long Lasting Bubbles
  • Magic Balloons
  • Magnified Light
  • Make a Compost Pile
  • Make a Fuse Model
  • Make a Parallel Circuit
  • Make An Elevator
  • Make Electric Circuits
  • Make Limestone
  • Make Objects Float
  • Make Static Electricity
  • Make your own sundial
  • Matchbox Guitar
  • Math and Gender
  • Mean, Median and Range
  • Measuring Air Pollution
  • Mentos Soda Volcano
  • Microbial Contaminants
  • Milky Plastic
  • Mini Greenhouse
  • Missing Reflection
  • Mixing With Water
  • Molls Experiment
  • Music and Plants
  • Musical Bottles
  • Nocturnal Plants
  • Ocean Life & Oil Spills
  • Ocean Temperature
  • Optical Mice
  • Oral Bacteria
  • Orange Water Volume
  • Organic vs. Inorganic
  • Osmosis
  • Oven Baked Ice Cream
  • Oxygen & Photosynthesis
  • Paper Bridge
  • Paper Marbling
  • Pascal’s Law
  • Play-Doh and Volume
  • Preserve Spider Webs
  • Pressure Volcano
  • Pulse Rates
  • Pythagorean Tuning
  • Refraction in Water
  • Rollercoasters & Loops
  • Rubber Bones
  • Rubber Heat Reaction
  • Rubbery Egg
  • Rust and Moisture
  • Search Engines
  • Secondary Colors
  • Seed Germination
  • Seed Germination II
  • Separate Salt And Pepper
  • Snappy Sounds
  • Soil Erosion
  • Soil vs. Hydroponics
  • Sound Waves
  • Spectrum through Water
  • Speed of Decomposition
  • Speed of Dissolving
  • Spore Prints
  • Star Observer
  • Static Electricity
  • Statistics and M&M’s
  • Stem-less Flowers
  • Super Strength Egg
  • Sweet Erosion
  • Temperature and CPUs
  • Thirsty Rocks
  • Tornado Demonstration
  • Translucent Egg
  • Transpiration in Plants
  • Typing and Speed
  • Vibrating Coin
  • Volcanic Gas
  • Water and Living Things
  • Water Displacement
  • Water Evaporation
  • Water pH
  • Your Planetary Age