When SA Node triggers Atria goes into Systole !! and when the signal reaches to AV node and from there it goes to Bundle of His making Ventricle to systole or constrict !!
So your answer is Systole !!
Answer:
Summary of Excretion so yea :()
the answer is a because if the model is based on experimental data it wont be good unless it has been tested.
I hate IREADY but 2 pounds cost 15
Monday 2pm, since it was forecasted to make landfall at that time
