To view the internal structure of the heart, first open the right atrium by making an
incision to the right of the atrioventricular sulcus then transversly to the point of entry of the
inferior vena cava. Locate structures such as the fossa ovalis and musculi
pectinati shown in this dissection.
Next open the right ventricle by making an incision
from the pulmonary trunk inferiorly along the right border of the interventricular
septum then transversely to the right along the inferior (acute) margin of the heart as shown on
the model.
Opening this flap reveals the contents of the
right ventricle. Compare your dissection
with a model. You should identify each of the tricuspid valves, papillary muscles
with their chorda tendinae, the moderator band, and trabeculae carne.
