1. The Heart
Prof.Khaled Na3im

3. The Pericardium There are 2 types of pericardium :
1. Fibrous pericardium : is a tough fibrous sac surrounds
the heart , it protects the heart &
helps venous return .
2. Serous pericardium : is a serous sac , has 2 layers ;
visceral & parietal .
. The visceral layer is fixed to
the heart muscles (epicardium)
. The parietal layer is separated from the
visceral layer by a potential space

4. The Heart
Position :The heart lies in the middle of the chest cavity (mediastinum ) between the 2 lungs The heart is deviated to the left side . Surfaces : the heart has 3 surfaces ; anterior , inferior & The upper border of the heart is above: is made up by the The apex of the heart is down : is made up by the left
posterior.
big vessels
Ventricle.

6. Chambers of the Heart
The heart has 4 chambers, 2 atria & 2 ventricles .
The right atrium : receives the venous return of the
body except the lungs .
The left atrium : receives the venous return of the
lungs ( oxygenated blood )
Right ventricle : pumps blood to the lungs
Left ventricle : pumps blood to the whole body

8. Aortic arch
arch

10. The big Vessels Right atrium 4 pulmonary veins Left atrium
SVC : sup vena cava
IVC : inf vena cava
Right atrium
4 pulmonary veins
Left atrium

12. The big Vessels The pulmonary trunk Right Ventricle The Aorta
Left Ventricle

13. 2 1 3

14. 1: one heart 2 : Two heart sounds: –Lab -Dup 3: three surfaces :-Ant, Post ,Inf 4 :chambers :-2 Atria , 2 Ventricles 4 : Valves :–Tricuspid , Mitral , -Pulmonary , Aortic