transport and heart Flashcards
1
Q
when do semi lunar valves close
A
when the pressure on the inside of the ventricle is lower than the outside
2
Q
what happens in atrial systole
A
-the atrial muscle contract
decreases the volume and increases the pressure
- av valves open blood moves into the ventricles
3
Q
what happens in ventricle systole
A
forces av valves to close
