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 !!
First one is digestive system
second one is lion fish
i dont know the third one. im sorry
They are made from igneous, metamorphic and sedimentary rock.
Moving a car and flying an airplane
Hundreds of years ago, explorers often died of scurvy. This bone-related disease be prevented by C) supplementing the diet with fresh fruit rich in vitamin C. Vitamin C is essential for the production of collagen which is found in bones and connective tissue. A lack of vitamin C can lead to a lack of collagen, leading to symptoms like gum disease, weakness, and bone pain.
