Question

v) Sino-atrial valve is present at the junction of _________ and Sinus venosus.​

Answer 1

Explanation:

the wall of right atrium

Answer 2

Sino-atrial valve is located between the atrium and Sinus venosus.

Explanation:

• These valves avoid the backflow of blood towards the sinus venosus during the atrial systole.
• The two lateral infoldings of the cardiac wall result in the formation of Sino-atrial valve. There is a slight shift towards the right atrium. The left fold is deeper than the right which causes a slight shift of the sinoatrial valve towards the right.
• The presence of valves is important as it provides uni-directional flow of blood.