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Thoracic viscera
Plural Cavities
Figure 1.9
Development of
serousal cavities
Development of
Pleural
cavities
Hemo-thorax
Pneumo-thorax
 Lung:
collapse
Mediastinum
Figure 1.9
Heart Covering
• Pericardial physiology
– Protects and anchors heart
– Prevents overfilling
Figure 17.2
External Heart: Anterior View
Figure 17.4b
External Heart: Posterior View
Figure 17.4d
External Heart: Anterior View
Figure 17.4b
External Heart: Anterior View
Figure 17.4b
Heart Valves
Figure 17.9
Heart Valves
Figure 17.10
External Heart: Posterior View
Figure 17.4d
Figure 17.4b
Pathway of Blood through the
Heart and Lungs
Figure 17.5
Relative thickness of muscular walls
“EKG”
(or ECG, electrocardiogram)
• Electrical
depolarization is
recorded on the body
surface
P wave=atrial depolarization
QRS=ventricular depolarization
T wave=ventricular repolarization
Cardiac muscle
(microscopic)
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