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Being Healthy PowerPoint Presentation

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Being Healthy Presentation Transcript

Slide 1 - Being Healthy Breathing and the lungs
Slide 2 - Objectives & Outcomes Objective: Develop understanding of the structure of the lungs and gas exchange. Outcomes: All: Explain the process of breathing (4) Most: Describe the difference between inhaled and exhaled air (5) Some: Describe how alveoli are adapted for their purpose (6/7) Extension: Describe how damaged alveoli can result in less gas exchange (7)
Slide 3 - The Respiratory System Gas exchange happens in the lungs. You have 2 lungs, situated in your upper thorax / chest Here, oxygen and carbon dioxide are exchanged – oxygen is needed for life and carbon dioxide is got rid of when we breathe out.
Slide 4 - How do we breathe? Mouth  Windpipe/trachea  bronchi  bronchioles  alveoli  blood
Slide 5 - Inhalation (When we breathe in we inhale)
Slide 6 - Exhalation (When we breathe out we exhale)
Slide 7 - Exchanging gases
Slide 8 - The Alveoli The outside of the alveoli is covered with tiny blood vessels. Oxygen makes its way into thousands of special air sacs collectively called the ALVEOLI.
Slide 9 - The Alveolus One of these alveoli is called the ALVEOLUS. This is where the oxygen is transferred into the blood and carbon dioxide moves out of the blood. If all these alveoli flattened and spread out onto the floor, they would cover an area the size of a tennis court!
Slide 10 - Comparing inhaled and exhaled air What are the big differences between inhaled and exhaled air? How could you test for these? There is another difference----water vapour.
Slide 11 - Lets take a closer look (avi)
Slide 12 - Backup of as wmv file
Slide 13 - avi
Slide 14 - wmv
Slide 15 - Task 1: With a partner Partner A – explain the process of breathing in and what gases exchange Partner B – explain the process of breathing out and what gases exchange Be prepared to share your answers with the class.
Slide 16 - Task 2 Label diagram of lungs and indicate where oxygen and carbon dioxide exchange in the lungs.
Slide 17 - Plenary Objective: Develop understanding of the structure of the lungs and gas exchange. Outcomes: All: Explain the process of breathing (4) Most: Describe the difference between inhaled and exhaled air (5) Some: Describe how alveoli are adapted for their purpose (6/7) Extension: Describe how damaged alveoli can result in less gas exchange (7)
Slide 18 - This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.