1 / 7

CHAPTER 8

CHAPTER 8. HAVE A HEART. SAM ERB. Functions of the Cardiovascular System. Delivers O 2 , nutrients, & hormones Transports waste products Consists of : the heart, blood vessels, and blood. The Heart Hollow, muscular organ Located inside thoracic cavity

olga-gilliam
Download Presentation

CHAPTER 8

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CHAPTER 8 HAVE A HEART SAM ERB

  2. Functions of the Cardiovascular System • Delivers O2, nutrients, & hormones • Transports waste products Consists of: the heart, blood vessels, and blood

  3. The Heart • Hollow, muscular organ • Located inside thoracic cavity • Layers: (external to internal) Epicardium, Myocardium, Endocardium • The Pericardium • Double-walled membrane surrounding the heart • Chambers • Upper chambers: Atria • Lower chambers: Ventricles • Blood flow within chambers is controlled by valves • Apex: “triangular” bottom of heart Structures of the Heart

  4. Blood Flow • Arteries away from heart • Veins toward heart • Sinoatrial node and Purkinje fibers establish rhythm • Electrical impulses from SA node travel to atrioventricular node (atria contract) • Impulse then sent to bundle of His and ventricular muscle (ventricles contract)

  5. Anatomy of an Electrocardiogram • What it does? • Measures electrical activity of myocardium • P Wave: depolarization of atria • QRS Complex: depolarization of ventricles • T Wave: repolarization of ventricles

  6. Common Tests & Ailments • Angiography • Study of blood vessels using contrast material • Radiography • Imaging objects by exposing sensitized film to X-rays • EKG • Aneurysm: balloon-like enlargement of artery • Hypoxia: below-normal levels of O2 • Occlusion: blockage in vessel or passageway • Atherosclerosis: hardening and narrowing of arteries

  7. Common Procedures • Angioplasty: surgical repair of blood or lymph vessels • Transfusion: introduction of whole blood or blood components  • Defibrillation: electrical shock used to restore normal heart rhythm • Stent: small expander implanted in blood vessel to prevent collapse 

More Related