1. The Respiratory System: Lungs Paul Guerra | Scott Horner

2. Today’s Objective Science TEKS: 7.12B. TSIET: identify the main functions of the systems of the human organism, including the respiratory system. Math TEKS: 7.9B. TSIET: Measurement. The student solves application problems involving estimation and measurement. (B) Connect models for volume of prisms and cylinders to formulas of prisms and cylinders.

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4. Why are lungs important? The lungs are the site of gas exchange, meaning that oxygen will enter your blood and carbon dioxide will leave your blood in the lungs. Oxygen is needed to generate energy in cells and carbon dioxide is a waste product that can acidify the blood if not expelled.

5. The Human Lungs #2 #1 #3 #4#5 #6#7

6. Interesting Lung Facts Your left lung is smaller than your right lung in order to have room for your heart. The only organ that can float on water. The pair of human lungs can hold about 6,000 cubic centimeters (6 liters) of air, but only a small amount of this capacity is used during normal respiration (breathing).

7. Lung Capacity (Volume) 7 cm 4 cm How much air fits in this shape? Step 1: Find out the area of the base. Step 2: Multiply by the height. A = L x W 4 cm 16 cm² 16 cm² x = 112 cm³ 7 cm

8. Lung Capacity (Volume) How much air fits in this shape? Step 1: Find out the area of the base. Step 2: Multiply by the height. A = π r ² 2 cm 12.56 cm² 12.56 cm² x = 87.92 cm³ 7 cm 4 cm

9. Lung Capacity Activity In this activity, you will use a balloon and a tape measure to determine your lung capacity (volume). Break up into groups of 2. - 1 Balloon Blower. - 1 Balloon Measurer. Balloon blowers will take a deep breath, and blow as much air as they possibly can into the balloon. Measurers will measure and record circumference (3 Trials) in order to determine the volume.

10. Volume of Balloon (Sphere) Using your average circumference, use the following formula to determine your radius. C = 2πrr = C/2π Using your radius, determine the volume of your balloon by using the following formula: V = (4/3)πr³ Example: Circumference of 67cmRadius of 10.87cm V = (4/3)π(10.87)³ = 5379.94 cm³ Record your data and be prepared to share your results with the class.

11. Factors Affecting Lung Capacity Larger VolumesSmaller Volumes MalesFemales Taller PeopleShorter People Non-SmokersHeavy Smokers AthletesNon-Athletes People living at high altitudesPeople living at low altitudes