Internal Heart Interatrial Septum

o Separates Atria Interventricular

Septumo Separates Ventricles

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

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

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

Internal Heart (Right Side)

Right Atrioventricular (AV) Valve Tricuspid Valve

3 cusps

Opens from Right Atrium to Right Ventricle

Prevents backflow

Internal Heart (Left Side) Left Atrium

Receives blood from lungs with O2

1. Blood gathers in Left & Right Pulmonary Veins

2. Pulmonary Veins deliver blood to Left Atrium

3. Blood from Left Atrium passes to Left Ventricle through Left Atrioventricular Valve

Internal Heart (Left Side) Left Atrioventricular (AV) Valve

Bicuspid Valve OR Mitral valveTwo- cusped valve

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

Right Ventricle vs. Left Ventricle

External Heart (Anterior)

Myocardial Blood Flow

Superior Vena CavaRight Auricle /Right Atrium

Base of the Heart

Coronary Vessels

Interventriclular Sulcus

Apex of the Heart

Left Auricle/Left Atrium

Pulmonary Trunk

Pulmonary Artery

Arch of Aorta