RESPIRATORY system
Project Proposal
Model Description:
We will have two different models; one for the oxygen exchange to carbon dioxide in the blood and the other a model of a working lung. We would start with a plastic tube that allows the air to go into the lungs. This plastic tube is connected to a cross section along with two balloons on the other two remaining sides. You put this contraption inside a huge jug for water and finally you cut a balloon ( without having more than one hole) and tape that on the bottom. If you pull this balloon at the bottom the pressure will increase and the lungs would expand. There will be water in each balloon and every time we pump them it will swap the water, which represents the oxygen and carbon dioxide being exchanged.
Functions the model will perform:
The model will perform the functions of transferring blood and also intaking oxygen and excreting carbon dioxide
Materials needed:
Cross-section pipe
3 balloons
Red food coloring
Water
Water jug
Clay/play dough
A straw
Duct tape
Masking tape
Scissors
Plastic tubing
Construction plan:
Biology/ Physics/ Chemistry principles used in the model/ functions
none
Model Description:
We will have two different models; one for the oxygen exchange to carbon dioxide in the blood and the other a model of a working lung. We would start with a plastic tube that allows the air to go into the lungs. This plastic tube is connected to a cross section along with two balloons on the other two remaining sides. You put this contraption inside a huge jug for water and finally you cut a balloon ( without having more than one hole) and tape that on the bottom. If you pull this balloon at the bottom the pressure will increase and the lungs would expand. There will be water in each balloon and every time we pump them it will swap the water, which represents the oxygen and carbon dioxide being exchanged.
Functions the model will perform:
The model will perform the functions of transferring blood and also intaking oxygen and excreting carbon dioxide
Materials needed:
Cross-section pipe
3 balloons
Red food coloring
Water
Water jug
Clay/play dough
A straw
Duct tape
Masking tape
Scissors
Plastic tubing
Construction plan:
- Take the water jug and cut it half
- Take the two balloons fill them with 3 tablespoons of red food coloring and water
- Tape each balloon on opposite sides of the cross-section
- Cut the plastic tube to about 16 inches
- Attach tube to remaining cross-section opening with duct tape
- Put cross-section with balloons through the hole of the jug
- Cover the bottom of jug with cut in half with large balloon
Biology/ Physics/ Chemistry principles used in the model/ functions
- Air pressure-is the force exerted on you by the weight of tiny particles of air (air molecules). Although air molecules are invisible, they still have weight and take up space.This is demonstrated in the respiratory system because the “lung” inflates and deflates based on the air pressure around the balloon.
- Newtons 3rd law- For every action, there is an equal and opposite reaction. When we pull the bottom balloon it creates the same amount of force on the two other pink balloons.
- Diffusion Diffusion is the net movement of a substance (e.g., an atom, ion or molecule) from a region of high concentration to a region of low concentration. Oxygen diffuses in the blood cells and the oxygen gets diffused from the blood at the beginning of the process.
- Gas exchange- The main exchange is when the carbon dioxide leaves the cell and oxygen takes its place.
- Pump- a mechanical device using suction or pressure to raise or move liquids, to compress gases, or force air into inflatable objects such as tires. This principle is shown in the respiratory system by how the blood is transferred up into the lungs and back through the heart.
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