Lung Function

Lung Function - lesson 1

1. Topic 3 – Lung Function Understand that the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity Learning Outcomes: A – Use independent skills to develop knowledge on the functioning of the lungs B – Explain important keywords associated with the functioning of the lungs C – Identify the different keywords associated with the functioning of the lungs Do Now Task – List everything you remember from GCSE about the functioning of the lungs

2. Background To maintain life humans must supply their bodies with oxygen and remove carbon dioxide. Why do we need oxygen in the body? To release the energy stored in food so it can be used to supply all the cells around the body The process of breathing, respiration and transportation of gases is done by the cardio-respiratory system. Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

3. Respiration External Respiration – The process of exchanging gases in the lungs Internal Respiration – The process of exchanging gases between the muscle cells and the blood Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

4. Background Efficient lungs and structures to have sufficient respiration Sports performer use more energy than the average person So will need an above average functioning of their systems Training forces the body to adapt so that the body is getting its required needs People with activity levels even below average will have lungs that may not even function for normal living activities Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

5. Task With your partner count how many breaths they take in a minute Write it on your page. Now perform a 1 minute jog with sprints – led by teacher Get partner to re-count breaths Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

6. Mechanics of Breathing To understand breathing we need to understand the structure of the lungs and the respiratory airways – The tubes that take the air to and from the lungs Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

7. Air Air is a mixture of gases Oxygen, nitrogen, carbon dioxide, inert gases and often some water vapour. Air enters the mouth, travels through the nasal cavity, through the larynx, down the trachea, into the bronchus, then bronchioles and finally into the alveoli or air sacs. Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity Task – Draw out a flow chart of this process and think of a mnemonic to help remember the process

8. Lungs Two sac-like organs, spongy in appearance and they sit in our chest or thoracic cavity. They are surrounded by the pleural membrane. And bordered by a sheet of muscle called our diaphragm. Air moves from areas of high to low pressure. When breathing in, our bodies lower the pressure in our lungs to that of the outside atmosphere so that air can flow into them. Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

9. Inspiration (breathing in) Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity

10. Expiration (breathing out) Understand the vital part the lungs and associated process of respiration play in enabling us to stay alive and to engage in physical activity