1. Lesson 5 The Circulatory System

2.  State the purpose, structures, and functions of the circulatory system  Discuss problems that occur within the circulatory system  Use idioms about the body while speaking and writing for impact

3. Thrombocytes Pulmonary Circulation SYSTOLIC = BP DIASTOLIC Leukocytes Hemoglobin

4. Image source: biology.clc.uc.edu

5.  Circulatory System Structure/Function  Anatomy of the Heart  Circulatory System Problems

6.  The circulatory system is responsible for transporting materials throughout the entire body  It transports nutrients, water, and oxygen to your billions of body cells, and carries away wastes such as carbon dioxide that your body cells produce

7.  The circulatory system is made up of 3 parts: ◦ Heart ◦ Blood ◦ Blood vessels

8. Image source: biology.clc.uc.edu

9. The heart is made of 4 chambers  Right and left atria (top chambers) ◦ Fill with the returning blood from the lungs  Right and left ventricles (bottom chambers) ◦ Pump blood to the body and lungs

10. The heart also has 2 sides  The right side ◦ Pumps blood to lungs to pick up oxygen  The left side ◦ Pumps oxygenated blood to rest of the body

11. The heart also has 4 valves  Mitral and tricuspid valves ◦ Allows blood flow from atria to ventricles  Aortic and pulmonary valves ◦ Control blood as it leaves the heart toward rest of body

12. Once blood leaves the heart, it travels through a series of “highways” or blood vessels  Arteries - carry blood away from the heart  Veins – carry blood back to the heart

13. Coronary Artery Disease (CAD)  Occurs when arteries become hardened and narrowed  Plaque builds on inner walls, reducing blood flow to the heart  Can cause: Angina Heart failure Heart Attack Arrhythmias

14. Hypertension (high blood pressure)  Occurs when the pressure against the walls of the blood vessels is too high  Weakens the artery walls, making them less flexible and forcing the heart to pump harder  Can cause: Heart attack Stroke Heart failure

15. Heart Valve Disease  Occurs when valve becomes narrowed (stenosed) ◦ Heart works harder; resistance to blood flow  OR Occurs when valve becomes incompetent ◦ Heart works harder to pump out blood because a portion leaks back into the heart  Can cause: Congestive heart failure Cardiomyopathy Arrhythmias

16.  State the purpose, structures, and functions of the circulatory system  Discuss problems that occur within the circulatory system  Use idioms about the body while speaking and writing for impact