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1. The septum: Divides the right and left chambers of the heart

2. Where are the valves located?: At the exit of each heart chamber

3. What do valves prevent?: Backward flow of blood

4. When do valves open?: When each chamber contracts

5. Where is the tricuspid valve?: At the exit of the right atrium

6. Where is the pulmonary valve?: At the exit of the right ventricle

7. Bicuspid (mitral) valve: At the exit of the left atrium

8. Aortic valve: at the exit of the left ventricle

9. What directions do veins carry blood?: Towards the heart

10. What direction do arteries carry blood?: Away from the heart

11. What type of blood do veins carry?: Deoxygenated blood

12. Which side of the heart do veins carry blood?: The right

13. Superior vena cava: Collects blood from the upper alf of body and directs it into the right atrium

13. Inferior vena cava: Collects blood from the lower half of body and directs it into the right atrium

14. Pulmonary veins: Carry the oxygenated blood from the lungs into the left atrium of the heart

15. Pulmonary artery: Carries deoxygenated blood from the heart to the lungs

16. Aorta: The large arterial trunk carries blood from the heart to be distributed by branch arteries through the body.

17. 4 chambers of the heart: Right atrium, left atrium, right ventricle, left ventricle

18. Systole: Contraction of the heart

19. Diastole: Relaxation of the heart

20. Path of blood flow:

Superior/Inferior vena cava

right atrium

tricuspid valve

right ventricle

pulmonary valve

pulmonary artery

lungs

pulmonary veins

left atrium

bicuspid valve

left ventricle

aortic valve

aorta

body (systemic circuit)

21. Right atrium: Receives deoxygenated blood from the body

22. Cardiac conduction system: A system of specialized muscle tissues that conducts electrical impulses that stimulate the heart to beat

23. Components of the cardiac conduction system: SA node, AV node, AV bundle, Av branches, and Purkinje fibers

24. SA node (Sinoatrial node): Pacemaker of the heart

25. AV node (atrioventricular node): Sends message to AV bundle

26. AV bundle: Sends messages to AV branches

27. AV branches: Sends messages to Purkinje fibers

28. Purkinje fibers: Fibers that carry stimulation throughout the ventricles causing them to contract

29. Cardiovascular disease: A general term for all diseases of the heart and blood vessels

30. Heart attack (myocardial infarction): Blood flow to the heart is completely blocked and oxygen cannot reach the cells in the region that is blocked

31. Hypertension: High blood pressure

32. Hypertension risk factors: Family history, age, gender, ethnicity, obesity, substance abuse, stress, diet, and sedentary lifestyle

33. Cardiac arrest: Sudden, unexpected stoppage of heart action, often leading to sudden cardiac death

34. Electrocardiogram: A recording of electrical activity of the heart

35. Angiogram: The radiographic visualization of blood vessels

36. Balloon angioplasty: A procedure in which a balloon attached to the end of a catheter is used to clear blockages in blood vessels

37. Right ventricle: Pumps deoxygenated blood to the lungs via the pulmonary artery

38. Left atrium: Receives oxygenated blood from the lungs via the pulmonary veins

39. Left ventricle: Receives oxygen-rich blood from the left atrium and pumps it into the body via the aorta

40. 4 valves of the heart: Tricuspid, pulmonary, bicuspid (mitral), and aortic

41. Where does blood travel to pick up oxygen?: The lungs

42. What valve is found between the right atrium and the right ventricle?: Tricupsid

43. What valve is found between the left atrium and left ventricle: Bicuspid (mitral)

44. What is the largest blood vessel found in the body?: Aorta

45. Natural pacemaker of the heart: SA node