1 / 20

The Cardiovascular System

The Cardiovascular System. The Cardiovascular System. A closed system of the heart and blood vessels The heart pumps blood Blood vessels allow blood to circulate to all parts of the body

tamarr
Télécharger la présentation

The Cardiovascular System

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. The Cardiovascular System

  2. The Cardiovascular System • A closed system of the heart and blood vessels • The heart pumps blood • Blood vessels allow blood to circulate to all parts of the body • The function of the cardiovascular _______________________________________________________________________________________________________________

  3. The Heart • Location • _________ between the _____ • Pointed ____ directed toward ___________ • About the size of your fist

  4. The Heart Figure 11.1

  5. The Heart: Coverings • ______________ – a double serous membrane • _______________________ • Next to heart • _______________________ • Outside layer • ______ ________fills the space between the layers of pericardium

  6. The Heart: Heart Wall • Three layers • _____________ • Outside layer • This layer is the parietal pericardium • ________________________ • _____________ • Middle layer • Mostly ___________________ • _____________ • Inner layer • ______________

  7. External Heart Anatomy Figure 11.2a

  8. The Heart: Chambers • Right and left side act as separate pumps • Four chambers • _________ • __________ chambers • Right atrium • Left atrium • _______________ • ___________ chambers • Right ventricle • Left ventricle Figure 11.2c

  9. Blood Circulation Figure 11.3

  10. The Heart: Valves • Allow blood to flow in only one direction • Four valves • __________________ valves – between atria and ventricles • _________________(left) • __________________(right) • ____________________between ventricle and artery • _______________semilunar valve • _________semilunar valve

  11. The Heart: Valves • Valves open as blood is pumped through • Held in place by _________ ___________ (“heart strings”) • Close to prevent ___________

  12. Operation of Heart Valves Figure 11.4

  13. The Heart: Associated Great Vessels • ________ • Leaves left ventricle • ____________________ • Leave right ventricle • ___________ • Enters right atrium • ___________________(four) • Enter left atrium

  14. Coronary Circulation • Blood in the heart chambers does not nourish the myocardium • The heart has its own nourishing circulatory system • Coronary arteries • Cardiac veins • Blood empties into the right atrium via the coronary sinus

  15. Heart Contractions • Contraction is initiated by the ____________ ______ • Sequential stimulation occurs at other autorhythmic cells

  16. Heart Contractions Figure 11.5

  17. Filling of Heart Chambers – the Cardiac Cycle Figure 11.6

  18. The Heart: Cardiac Cycle • Atria contract simultaneously • Atria relax, then ventricles contract • _________ = contraction • _________ = relaxation

  19. The Heart: Cardiac Output • Cardiac output (CO) • Amount of blood pumped by each side of the heart in one minute • CO = (heart rate [HR]) x (stroke volume [SV]) • Stroke volume • Volume of blood pumped by each ventricle in one contraction

  20. Cardiac Output Regulation Figure 11.7

More Related