The document describes the structure and function of the human heart. It outlines the four chambers of the heart, including the right and left atria and ventricles. It details the pathway of blood flow through the heart, from entry via the vena cava into the right atrium and ventricle, then to the lungs via the pulmonary artery where blood is oxygenated, and back to the left atrium and ventricle before exiting into the aorta and circulation of the body. Key components include the tricuspid, bicuspid/mitral, and semilunar valves that ensure one-way blood flow. The heartbeat cycle and measurement of blood pressure are also summarized.

1. The Heart

2. Superior vena cava inferior vena cava

3. Superior vena cava inferior vena cava Right atrium Tricuspid valve

4. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle

5. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery

6. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery

7. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery LUNGS OXYGENATE THE BLOOD

8. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery

9. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery Left Atrium Mitral valve Pulmonary vein

10. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery Left Atrium Mitral valve Left ventricle

11. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery Left Atrium Mitral valve Left ventricle Aorta Septum Aortic valve

12. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery Left Atrium Mitral valve Left ventricle Aorta Septum Aortic valve

13. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery Left Atrium Left ventricle Aorta Septum Mitral valve Bicuspid valve Aortic valve

14. Superior vena cava inferior vena cava Right atrium Tricuspid valve Right ventricle Pulmonary valve Pulmonary artery Left Atrium Mitral valve Left ventricle Aorta Septum Aortic valve

15. atrioventricular valve atrioventricular valve semilunar valve semilunar valve

16. Prosthetic Valves

18. The Heartbeat

19. The Heartbeat Atrioventricular node Ventricles Atria Body/Lungs Atrioventricular Sinoatrial node Atria Ventricles Ventricles Semilunar SYSTOLE DIASTOLE

20. The Heartbeat: Blood Pressure Blood Pressure: Measure of force of blood in arterial wall Normal blood pressure Sphygmomanometer SYSTOLIC pressure DIASTOLIC pressure 120 80