1. Internal Heart Interatrial Septum Interventricular Septum
Separates Atria
Interventricular Septum
Separates Ventricles

2. Internal Heart Atrioventricular (AV) Valves
Connects Right Atrium to Right Ventricle & Left Atrium to Left Ventricle
Permits blood flow in ONE DIRECTION from Atria to Ventricle
Atrium to Ventricle

3. Internal Heart (Right Side)
Right Atrium
Receives blood form Body with CO2
Superior Vena Cava
Receives blood from Head, Neck, Upper Limbs & Chest
Inferior Vena Cava
Receives blood from Trunk & lower Limbs

4. Internal Heart (Right Side)
Right Ventricle
Pumps blood with CO2 to lungs
Chordae Tendineae
Edges attached to AV Valve
Papillary Muscles
Attached to Chordae Tendineae
Prevents AV Valves from opening backwards

5. Internal Heart (Right Side)
Right Atrioventricular (AV) Valve
Tricuspid Valve
3 cusps
Opens from Right Atrium to Right Ventricle
Prevents backflow

6. Internal Heart (Left Side)
Left Atrium
Receives blood from lungs with O2
Blood gathers in Left & Right Pulmonary Veins
Pulmonary Veins deliver blood to Left Atrium
Blood from Left Atrium passes to Left Ventricle through Left Atrioventricular Valve

7. Internal Heart (Left Side)
Left Atrioventricular (AV) Valve
Bicuspid Valve OR Mitral valve
Two- cusped valve

8. Internal Heart (Left Side)
Left Ventricle
Pumps blood with O2 to body
Holds the same Volume as the Right Ventricle
Left Ventricle is:
LARGER
Muscle is THICKER & more POWERFUL

9. Right Ventricle vs. Left Ventricle

10. External Heart (Anterior)
Arch of Aorta
Pulmonary Artery
Superior Vena Cava
Pulmonary Trunk
Right Auricle /
Right Atrium
Left Auricle/
Left Atrium
Base of the Heart
Coronary Vessels
Apex of the Heart
Interventriclular Sulcus
Myocardial Blood Flow