Activity 1: Bottled Balloons
Objectives:
Explain how the lungs work
Describe how the movement of the diaphragm helps the air go in and out of the lungs
Materials:
1 two-liter empty plastic bottle
3 balloons (1 big, 2 small)
1 sturdy straw 1 pair of scissors
5 rubber bands
Procedure:
1. Using a pair of scissors, cut the bottom out of the 2-liter plastic bottle.
2. Create two holes that are apart from each other in the cap of the plastic bottle. Make
sure that each hole is just big enough for a straw to fit through.
3. Stick the two straws through the two holes of the bottle cap.
4. Place one balloon on the end of each straw, and secure them with rubber bands, as shown in the figure
below.
5. Stick the balloon ends of the straws through the bottle opening and screw the lid on
tightly.
6. Stretch out the larger balloon and place it over the open bottom of the bottle. Secure
it with the rubber band as tightly as possible. Refer to the diagram of the finished lung
model below.
7. Pull the larger balloon down; that is, away from the bottle, in order to blow up the two
small balloons.
8. Push the larger balloon towards the bottle in order to let the air out of the two small
balloons.
9. Write down your observations.
Q1. What does each part of the constructed lung model represent?
The Constructed lung model represents breathing and how the respiratory systems works on it.
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Q2. What happens as you pull down the balloon at the bottom of the model?
When a person pull the balloons at the bottom part the two balloons at the center will get bigger.
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Q3. What happens as you push up the balloon?
The lungs will getting bigger and bigger.
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Q4. How does the movement of the diaphragm cause the air to go in and out of the
lungs?
The diaphragm movement causes the lungs to relax it and when the air out of it and when the air will
bring itself in the lungs
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Activity 2: Pump It!
Objectives:
Describe how the heart functions
Explain how blood is pumped by the heart
Materials:
1 beaker or wide mouthed jar
1 balloon
2 flexible drinking straws
1 pair of scissors
1 large pan or sink
adhesive tape
water
Procedures:
1. Fill the jar half full of water.
2. Cut the neck of the balloon off at the part where it starts to widen into a balloon.
Set the neck part aside to be used later on.
3. Stretch the balloon over the opening of the jar, pulling it down as tightly as you
can. The flatter you can get the surface of the balloon, the better.
4. Carefully poke two holes in the surface of the balloon. Make them about an inch
apart from each other and near opposite edges of the jar.
5. Stick the long part of a straw into each hole. The straws should fit securely in the
holes so no air can get through around the straws.
6. Slide the uncut end of the balloon neck onto one of the straws and tape it around
the straw.
7. Set your pump in a large pan or the sink to catch the pumped water. Bend the
straws downward. Gently press in the center of the stretched balloon and watch
what happens to the water in the jar.
8. Refer to the photo below to know what your setup must look like.
Guide Questions:
Q16. What does the water inside the jar represent?
It represents the blood.
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Q17. How will you compare the heart pump model and the human heart?
The other one needs to be blocked it so that it will pump the blood properly.
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Q18. How does the heart function as a pump?
Pumps blood in our body heart.
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Q19. Will the heart model be able to function properly if the straw is blocked? Explain
your answer.
Yes , because if its not blocked , it may cause the heart will not pump blood properly.
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