1. Do now: What is blood doping? Generally, blood doping refers to the use of performance-enhancing drugs (PEDS) that are administered into an athlete's blood system to increase the oxygen-carrying capacity of his blood by increasing the amount of red blood cells in his body. "Elevated blood levels, gained by using EPO or other blood doping methods give a huge advantage because oxygen-rich blood cells allow the muscles to work for longer, and to recuperate better after an extreme effort," says former U.S. Postal Service Team doctor Prentice Steffen.U.S. Postal Service

2. Homework Due today, Wednesday June 13 th Section 33.3 – The Respiratory System/ Pages 963- 968 Thursday June 14 th Quiz on Sections 33.1, 33.3 Due Friday June 15 th Research project final draft. Still waiting on most of these.

3. Quick review The heart and vessels What is the purpose of the Atrium? What is the purpose of the ventricles? Why is the left ventricle walls thicker?

4. New Material What is the difference between Veins versus arteries? Veins carry deoxygenated blood (lacking O 2 ), except Pulmonary Arteries & Veins

5. New Material Blood Flow & circulation – Blood going to the lungs is to exchange CO 2 Gas for O 2 Gas. which will expelled when exhaling.

6. New Material Blood Flow & circulation – Blood Pressure. For example 120 / 80. What does that mean?

7. New Material If we finish early begin reading Section 33.3 – The Respiratory System/ Pages 963- 968 Reminder: Go to the paper guidelines http://science.hyde.wikispaces.net/Biol ogy-Walsh http://science.hyde.wikispaces.net/Biol ogy-Walsh Please place the chairs on the tables and clean around your desk. Wait to be dismissed