Ch. 18 The Heart

1
Ch. 18 The Heart
2
Heart Anatomy
Figure 18.1
3
Covering of the Heart
(double-walled sac)
4
Coverings of the Heart
5
3 Layers of Heart Tissue
1
2
(cardiac muscle)
3
(simple squamous epithelium)
6
Exterior Heart Structures
Aorta
Pulmonary arteries
Superior vena cava
Pulmonary trunk
Right atrium
Pulmonary veins
Right ventricle
Left ventricle
Inferior vena cava
7
Flow Through the Heart
9 Aorta(to body)
5 Pulmonary arteries(to lungs)
1 Superior vena cava(from body)
Gas exchange in lungs
6 Pulmonary veins(from lungs)
4 Pulmonary trunk
7 Left Atrium
2 Right Atrium
1 Inferior vena cava(from body)
8 Left Ventricle
3 Right Ventricle
8
Atrioventricular Valves
Left atrium(from pulmonary veins)
Bicuspid valve
Right Atrium(from vena cavae)
Left ventricle (from left atrium)
Tricuspid valve
Right Ventricle (from right atrium)
9
Atrioventricular Valve
Figure 18.8c, d
10
Atrioventricular Valve Function
Figure 18.9
11
Semilunar Valves
Aortic semilunar valve
Left atrium(from pulmonary veins)
Pulmonary semilunar valve
Right Atrium(from vena cavae)
Left ventricle (from left atrium)
Right Ventricle (from right atrium)
12
Semilunar Valve Function
13
Diastole Passive Ventricular Filling
14
Diastole Active Ventricular Filling
15
Ventricular Systole Isovolumetric contraction
16
Ventricular Systole Ventricular Ejection
17
Diastole Isovolumetric Relaxation
18
Pathway of Blood Through the Heart and Lungs
Figure 18.5