1. Warm Up for Blood Vessels  NO DEVICES TODAY, PUT THEM AWAY PLEASE  Complete the conduction pathway worksheet and hold on to it  We will review it after 5-7 minutes  You may use the textbooks  Small text: pg. 377  Larger text. pg. 595

2. BLOOD VESSELS 4/4/16

3. Blood Vessels

4. Structure  tunica intima  innermost layer  tunica media  middle layer  tunica externa  outermost layer

5. Circulation: Moving Blood around the Body  cardiopulmonary circulation  between heart and lungs  systemic circulation  between heart and body

6. Circulation: Moving Blood around the Body

7. Cardiac Circulation  Right coronary artery has two main branches  Supply blood to the inferior and posterior walls of the heart

8. Cardiac Circulation  Left coronary artery divides into two arteries Left Anterior Descending Artery (widow maker) Circumflex Artery  Supply blood to the anterior, lateral, and posterior walls of the heart

12. Cardiac Circulation  Coronary arteries fill when the ventricles are relaxed  They close off when the ventricles contract to protect them from the high pressure that is created

13. Cardiac Circulation  Both ventricles receive their blood supply from the right and left coronary arteries  Each atrium only receives blood from its corresponding artery

14. Cardiac Circulation  Both ventricles receive their blood supply from the right and left coronary arteries  Each atrium only receives blood from its corresponding artery

16. Cardiac Circulation  The most abundant supply of blood goes to the myocardium of the left ventricle (because it does most of the work)  The right coronary artery is dominant in about 50% of all hearts