First phase Flashcards
1
Q
What is the first phase?
A
Atrial contraction and ventricle filling.
2
Q
What happens in the first phase chambers?
A
The atria contract and the ventricles relax.
3
Q
What happens to the pressure in the first phase?
A
Pressure in the atrial chambers and arterial trunk increases.
4
Q
What happens to the valves in the first phase?
A
AV valves open and semilunar valves close.
