A.V. Node

Inside wall of right atrium, highest up.

Aorta

Red trunk at top

Aortic Semilunar Valve

Inside left ventricle, looks like Mercedes symbol

Apex 

Front and center of heart 

Bicuspid Valve

Right over aortic semilunar valve (mercedes sign) in left ventricle 

Chordae Tendineae

Attached to the tricuspid valve

Circumflex artery 

Right below left atrium and next to left ventricle 

Coronary Sinus

Big "blue" vein that wraps around the back, only thing on back of heart model need to know

Fossa Ovalis

Right under the A.V. Node, in center of right ventricle

Inferior Vena Cava

Vein that stick out bottom of heart 

Interventricular Septum

Separates the two sides of the heart, directly in between the right and left ventricle

Left Atrium

Right above left ventricle 

Left bundle branch 

On side of interventricular septum on each side (left and right)

Left coronary artery 

Right underwear the pulmonary trunk

Ligamentum Arteriosum 

"String" on top that connect the pulmonary trunk to the aorta 

Papillary Muscle

Muscle right below the bicuspid (toward right) and tricuspid (in center

Pulmonary semilunar valve 

White "nob" in right ventricle 

Purkinje Fibers 

Outer walls of heart

Right Auricle 

"wing like" structure over the right atrium 

Right Coronary Artery 

"skinny tube" under aorta 

S.A. Node

Lining on right atrium, right near hinge on heart model

Superior Vena Cava

Blue trunk coming out of the top that is next to the aorta 

Trabeculae Carneae 

Thing that comes off the bicuspid and tricuspid

Tricuspid Valve

White "Net circle thing" located in right atrium