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Cardiovascular System

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Presentation on theme: "Cardiovascular System"— Presentation transcript:

1 Cardiovascular System
Lecture 17 Cardiovascular System The Heart

2 Size, Shape, Location of the Heart
Size of a closed fist Shape Apex: Blunt rounded point of cone Base: Flat part at opposite of end of cone Located in thoracic cavity in mediastinum Fig. 22.2

3 Pericardium Fig. 22.3

4 External Anatomy Four chambers Auricles Major veins Major arteries
2 atria 2 ventricles Auricles Major veins Superior vena cava Inferior vena cava Pulmonary veins Major arteries Aorta Pulmonary trunk Fig. 22.5

5 External Anatomy Fig. 22.5

6 Heart Valves Atrioventricular Semilunar Chordae tendineae
Tricuspid Bicuspid or mitral Semilunar Aortic Pulmonary Chordae tendineae Papillary muscles Fig. 22.6

7 Heart Valves Tricuspid valves Bicuspid valves
Pulmonary semilunar valves Aortic semilunar valves

8 Location of Heart Valves
Clinical View, pg. 664

9 Function of the Heart Valves

10 Function of the Heart Valves

11 Review Question Damage to the mitral valve could result in an inefficient flow of blood from the _____________ to the _________________. Pulmonary trunk to right ventricle Right atrium to right ventricle Left ventricle to aorta Right ventricle to left ventricle Left atrium to left ventricle

12 Blood Flow Through Heart

13 Systemic and Pulmonary Circulation

14 Points to Remember Heart is size of a closed fist and located in mediastinum beneath rib cage Heart is enclosed in pericardium with pericardial fluid Heart has four chambers: two atria and two ventricles Valves control flow of blood within and out of heart Heart is part of dual circuits for flow of blood - systemic and pulmonary

15 Questions?

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