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 rest depends on what what kind of keyboard you have and what program you are using will determine their functions. It also depends on whether you use the F key on it's own or in combination with another key like the Alt or Ctrl keys on a PC keyboard and/or the Function key on a laptop.For instance, I have a multi functional keyboard and depending what mode it is in, it completely changes the functions of the F keys.unction keys (the F-keys) are found on most every computer, but their usage is not standard. Many programs assign special functions to these keys (hence their name), and computer manufacturers also assign system-level actions to certain keys.