valves Flashcards
1
Q
what do valves do when pressure is behind the valves
A
they open
2
Q
what do valves do the the pressure is higher infront of the valves
A
they close
3
Q
what do the valves opening and closing prevent
A
backflow of blood
4
Q
what valves open when the pressure is higher in the ventricle compared to the artery
A
the semi lunar valves
5
Q
when do semi lumar valves close
A
when the pressure is higher in the arteries compared to the ventricles
