Question

The sino-auricular valve occurs

• A. In the sinus venosus
• B. In the edges of sino-auricular aperture
• C. In the truncus arteriosus
• D. At the auriculo-ventricular aperture

Answer 1

The correct option is B In the edges of sino-auricular aperture

In the right auricle, there is a large aperture called as sino-auricular aperture. It is guarded by 2 flap like sino-auricular valves. These valves prevents the back flow of the blood from the right auricle into the sinus venosus.