1. Respiratory System
Monday 23rd February

2. Starter Identyfy 3 points for each point
Short term effects of exercise on the heart
Short term effects of exercise on muscels
Short term effects of exercise on the respiratory system
5minutes

3. Learning Intentions
To fully understand the functions of the respiratory system
Show understanding f the immediate and long-term effects of exercise on the respiratory system
To apply new knowledge to exam questions

4. Respiratory System During Exercise
During exercise the body needs to take in a sufficient supply of oxygen and eliminate carbon dioxide produced by muscles
Oxygen is breathed in and carbon dioxide is breathed out- Gaseous Exchange
An efficient respiratory system allows more oxygen to reach the blood, which leads to our muscles
Working very hard leads to the body needing more oxygen than it can get- Oxygen Debt

5. a) b) c) d) e) f) g)

6. The Respiratory System has two main functions
To bring Oxygen into the body
To take carbon dioxide out of the body

7. How the Respriorty System works
We breath in through our nose & mouth-Inhaling.
Air is warmed and moistened once it has been breathed in.
Our intercostal muscles contract and lift the chest upwards and outwards & our diaphragm tightens. These actions allow our lungs to open and create a vacuum to allow oxygen in.

8. Air then passes through the trachea, then through the bronchia into the left and right lungs.
It then passes through bronchioles which lead to millions of sacks called alveoli.
The alveoli is surrounded by capillaries which carry oxygen via blood to our muscles.
At the same time waste-rich blood releases carbon dioxide into the alveoli. It then takes the opposite journey out of the body.

9. Key Termanology
Tidal Volume (TV) is the volume of air either inspired or expired per breath. This increases during exercise.
Inspiratory reserve volume (IRV) is the maximal volume inspired in addition to the tidal volume. This decreases during exercise.

10. Expiratory reserve volume (ERV) is the maximal volume expired in addition to the tidal volume. This decreases slighlty during exercise.
Residual volume (RV) is the ammount of air left in the lungs aftrer maximal expiration. This slightly decreases after exercise.
Total lung capaciy (TLC) is the vital capacity plus the residual volume and is the volume at the end of maximal inspiration.
Vital Capacity (VC) is the maximum amount of air that can be forcible exhaled after maximal inspiration. This slightly decreases after exercise.
Breathing rate (BR) increases due to the demands for more exercise.

11. Immediate/Short term effects of exercise on the Respiratory System
Breathing quickens and deepens
Strenuous exercise may lead in oxygen debt
An efficient respiratory system aids the cardiovascular system

12. Long term effects of exercise on the Respiratory System
After a sustained period of regular exercise the lungs become more efficient allowing a better delivery of oxygen to the muscles
This means the body can cope better with the demands of exercise
Carbon dioxide is removed quicker
Vital Capacity is increased

13. Past Questions
During a match a player builds up an oxygen debt. What is oxygen debt?(1)
If a games player has built up oxygen debt will they have been working aerobically or anaerobically?(1)
What by-product is associated with oxygen debt?(1)
State TWO ways in which a performer could help remove this product?(2)