If the pulmonary valve is open, which 2 valves should be closed?

This causes the pulmonary valve to close in the tricuspid valve to open. this lets blood flow right into the right ventricle that was returned to the right atrium from the body. when the left ventricle contracts, the right ventricle also contracts. this causes the pulmonary valve to open and the tricuspid valve to close.

Explanation:

Hope this helped Mark BRAINLEST!!!

well when looking at this if you think about it   negativley and positivley   react with each other and when the first layer gets full they add layers it starts with 2 on the first layer and it constantly goes on until the official number is there