O2 AND Athletic Performance

ALVEOLI IN THE LUNG

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

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

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.

Gas Transfer at the Alveoli

• SIMPLE DIFFUSION

• Concentration gradient needed

• Oxygen into blood, Carbon Dioxide into lung.

Gas Transfer at the Tissues

• SIMPLE DIFFUSION

• Carbon Dioxide to Capillary, Oxygen into cell.

HEMOGLOBIN: Structure

• There are 250 million hemoglobin molecules on a single RBC!

RED BLOOD CELL LIFE CYCLE

“THE MASTERS”

Adaptations?

Pronghorn Adaptations

Larger windpipes

Lung Size

Muscle Cells

Heart

SELECTION PRESSURES? COST???