The Respiratory System – 5th Class Room 7

We investigated the respiratory system for the science exhibition.

First of all we learned how we breathe and the parts involved in the respiratory system.

We then carried out two experiments: How to Make a Model Set of Lungs and How to Measure Your Lung Capacity.

How To Make a Model Set of Lungs

Equipment needed:

A 2 litre bottle, 2 balloons, blue tack, a rubber glove, sellotape.

Method:

Step 1: First, cut a 2 litre bottle in half.

Step 2: Next, place a straw into a balloon and use sellotape to stick it on. Ensure that there is no air getting through. This will represent our trachea and our lung.

Step 3: Repeat step 2 as we have 2 lungs.

Step 4: Then, place the two lungs through the top of the bottle and secure using blue tack. Again, make sure that there is no air getting through.

Step 5: After that, place a rubber glove on the bottom part of the bottle.

Step 6: Finally, pull down on the rubber glove to show the air coming into the lungs and going out of the lungs.

What We Have Learned:

  • The diaphragm moves down when we breathe in to make room for air in the lungs.
  • The diaphragm moves up when we breathe out pushing out the air.
  • The diaphragm is an important muscle in our breathing system.

How to Measure Your Lung Capacity

Equipment needed:

Permanent marker, 5 litre bottle, basin, plastic tubing

Method:

Step 1: First, using a permanent marker, mark off a 5 litre bottle into 250 millimeter intervals.

Step 2: Next, fill the bottle up with water.

Step 3: Then, place a piece of tubing into the bottle.

Step 4: Ask your friend for some help in placing the bottle into a half filled basin of water. Ensure it is placed in the sink in case there is an over spillage of water.

Step 5: After that, place the tubing in your mouth. Taking an ordinary breath, blow out as much water as you can.

Step 6: Record, in millimeters, how much water you have blown out of the bottle.

Step 7: Then, fill up the bottle again. This time take a deep breath and blow into the bottle.

Step 8: Record, in millimeters, how much water you have blown out of the bottle.

Step 9: Do 15 minutes exercise a day for two and a half weeks.

Step 10: Finally, repeat Steps 2-8 after two and a half weeks.

What We Have Learned:

  • Two people from our class measured their lung capacity before and after 15 minutes of exercise over two and a half weeks
  • The results showed that their lung capacity had increased after two and a half weeks

We also carried out our own research about the respiratory system. This included information about; Smoking and the Lungs, How the Respiratory Works with Other Systems in the Body and Asthma.