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20-1 Lecture 17 Cardiovascular System The Heart. 20-2 Size, Shape, Location of the Heart Size of a closed fist Shape –Apex: Blunt rounded point of cone.

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Presentation on theme: "20-1 Lecture 17 Cardiovascular System The Heart. 20-2 Size, Shape, Location of the Heart Size of a closed fist Shape –Apex: Blunt rounded point of cone."— Presentation transcript:

1 20-1 Lecture 17 Cardiovascular System The Heart

2 20-2 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 20-3 Pericardium Fig. 22.3

4 20-4 External Anatomy Four chambers –2 atria –2 ventricles Auricles Major veins –Superior vena cava –Inferior vena cava –Pulmonary veins Major arteries –Aorta –Pulmonary trunk Fig. 22.5

5 20-5 External Anatomy Fig. 22.5

6 20-6 Heart Valves Atrioventricular –Tricuspid –Bicuspid or mitral Semilunar –Aortic –Pulmonary Chordae tendineae Papillary muscles Fig. 22.6

7 20-7 Heart Valves Tricuspid valves Bicuspid valves Aortic semilunar valves Pulmonary semilunar valves

8 20-8 Location of Heart Valves Clinical View, pg. 664

9 20-9 Function of the Heart Valves Fig

10 20-10 Function of the Heart Valves Fig

11 20-11 Review Question Damage to the mitral valve could result in an inefficient flow of blood from the _____________ to the _________________. (a)Pulmonary trunk to right ventricle (b)Right atrium to right ventricle (c)Left ventricle to aorta (d)Right ventricle to left ventricle (e)Left atrium to left ventricle

12 20-12 Blood Flow Through Heart Fig

13 20-13 Systemic and Pulmonary Circulation Fig

14 20-14 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 20-15 Questions?


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