The structure present anterior to transverse pericardial sinus is: (A) Inferior vena cava, (B) Superior vena cava, (C) Aoa, (D) Pulmonary aery
Answer is C. Transverse sinus is a horizontal gap between the aerial and venous ends of the hea tube, it is bound Anteriorly: ascending aoa, pulmonary trunk Posteriorly: SVC Inferiorly: L. atrium On each side it opens into the general pericardial cavity. Oblique sinus is a narrow gap behind the hea. It is bound anteriorly : L. atrium posteriorly: R. parietal pericardium, oesophagus.