Atria would be empty during the atrial diastole.
1 :an abnormal pouch<span> or sac opening from a </span>hollow organ<span> (as the colon or bladder)
2 :a blind tube or sac </span>branching<span> off from a cavity or canal of the body. the liver is an anterior diverticulum of the intestine.</span>
For items over 50 pounds, squat down and firmly grasp the object. If necessary use gloves. When lifting, lift with the knees, not the back.