Coronary Artery Disease. The coronary arteries are the blood vessels that supply the heart with oxygen and nutrients. When there is build up of cholesterol (plaque) inside the walls of the coronary arteries, the blood flow to the heart decreases.Usually there are no symptoms when the blockage is small.his completely blocks the flow of blood in the artery. The area of heart muscle supplied by that artery then becomes damaged due to lack of oxygen and nutrients. Blockages of any size can cause a heart attack (myocardial infarction).Coronary artery disease is very common throughout the world.
A function key is a key on a computer or terminal keyboard which can be programmed so as to cause an operating system command interpreter or application program to perform certain actions, a form of soft key. On some keyboards/computers, function keys may have default actions, accessible on power-on.
The function key, labeled Fn and located in the lower-left corner of your keyboard, is a useful feature. By pressing Fn along with one of the numbered function keys at the top of the keyboard (F1 through F12), you can adjust your screen brightness, enable and disable your touchpad or wireless modem, lock your computer and complete a variety of other tasks. These keys will not work if the Fn key is not pressed along with them.