Question

Sinus venosus occurs on

• A. Dorsal side of heart
• B. Ventral side of heart
• C. Basal region of heart
• D. Apical end of heart

Answer 1

The correct option is A Dorsal side of heart

Sinus venosus on the dorsal surface of the heart, two precaval and a postcaval fused to form a wide chamber called sinus venosus. It is a thin-walled dark colored triangular structure which opens into the right auricle. It receives impure blood from all parts of the body and pours it into right auricle.

So the correct answer is 'Dorsal side of heart'.