The diastolic blood pressure number or the bottom number indicates the pressure in the arteries when the heart rests between beats. This is the time when the heart fills with blood and receives oxygen. A normal diastolic blood pressure number is less than 80. A diastolic blood pressure between 80 and 89 indicates prehypertension.
Aang used airbending to handle an airball. Airball was a ball game played by the Air Nomads atop a court of towering wooden poles. In the game, which could be played with a minimum of two participants, the players would use their airbending to cause a hollow ball to ricochet among the poles and enter the goal on the other side of the court.
An airfoil is a specific shape, notably that used in airplane wings, which helps generate lift. In addition to airplane wings, which are the most well-known airfoils, fans, propellers, and some stabilizers are also in the shape of an airfoil. In nature, the airfoil is a very common shape, found in plants and in creatures that fly through the air or swim through the water. The basic principle by which an airfoil operates is referred to as lift. The shape of an airfoil is such that wind can pass both above and below it.