1. O 2 AND Athletic Performance

3. ALVEOLI IN THE LUNG Alveoli are the places where gas exchange occurs in the lung. Why is surface area an important consideration here?

4. Healthy vs. Cancerous Lungs (What happens when surface area decreases?

5. The Heart is responsible for movement of deoxygenated blood from the body to the lungs and the movement of oxygenated blood from the lungs to the body.

6. Gas Transfer at the Alveoli SIMPLE DIFFUSION Concentration gradient needed Oxygen into blood, Carbon Dioxide into lung.

8. Gas Transfer at the Tissues SIMPLE DIFFUSION Carbon Dioxide to Capillary, Oxygen into cell.

9. HEMOGLOBIN: Structure There are 250 million hemoglobin molecules on a single RBC!

11. RED BLOOD CELL LIFE CYCLE

14. “THE MASTERS” Adaptations?

15. Pronghorn Adaptations Larger windpipes Lung Size Muscle Cells Heart SELECTION PRESSURES? COST???