1. The Body Structure and Function

2. Oxygen Transport System The main aim of the Oxygen transport system is to help a person exercise. The oxygen transport system provides the muscles and the body with oxygenated blood that helps the body to keep working efficiently. The harder you train, the harder your oxygen transport system must work. However, as a person becomes fitter, less effort is needed for the same amount of work.

3. Oxygen Transport System Cont. The Oxygen transport system is made up of the respiratory system and the circulatory system. Give a definition of each of these systems. Which activities from your Standard Grade course will make the most demands on your oxygen transport system?

4. Why Exercise? Regular exercise increases the size of the heart allowing more blood to be pushed around the body with every beat of the heart. -Will this lower or raise your heart beat? - Now check your resting heart beat. My resting heart beat is_______bpm.

5. Why Exercise Cont. Regular exercise increases the Vital Capacity of the lungs. This means that your lungs can take in more oxygen with each breath you take. - Now check your resting breathing rate. - My resting breathing rate is_____ times per minute.

6. Oxygen Debt If the body is performing at a high intensity for long periods of time, it can become difficult for your breathing to supply enough oxygen to working muscles. This will cause a build up of lactic acid in the muscles, and the body will slow down. This is known as Oxygen Debt. Can you think of FOUR activities where Oxygen Debt may be a problem?

7. Questions Now answer Questions 35, 36 & 37 on Page 17 of Leckie and Leckie Book.