Open this full-sized heart (3½” x 4″ x 4½”) to show the inner chambers, the aortic arch, the superior and inferior venae cavae, and pulmonary and cardiac veins. Comes with base and key card.Detailed and full-sized, this two-piece model opens in half to show inner chambers of the heart as well as the aortic arch, superior and inferior venae cavae, and pulmonary and cardiac veins. Comes with base and key card that highlights anatomical features. A great teaching tool for anatomy lessons and for patient education to prompt frank discussions about heart health.