Question

A patch of nodal tissue present in the _______________ of the ____________ (C) is called the ________________ (B). Another mass of nodal tissue seen in the ______________________ called the ________________________ (D) .

Answer 1

C) right upper corner of the right atrium

B) sino-atrial node.

D) lower left corner of the right atrium close to atrio ventricular septum is called atrio-ventricular septum.