\(y=\frac{1}{x}\) This means that the line y=0 is a horizontal asymptote. Horizontal asymptotes occur most often when the function is a fraction where the top remains positive, but the bottom goes to infinity. Going back to the previous example, \(y=\frac{1}{x}\) is a fraction.
Causes of Wounds. Wound causes can be internal or external in origin. Wounds of internal origin are mainly due to impaired circulation, neuropathy or medical illness. Wounds of external origin are due to an outside force or trauma that causes open or closed wounds.
1 A puncture wound is caused by an object piercing the skin and creating a small hole. Some punctures are just on the surface. Others can be very deep, depending on the source and cause.  A puncture wound does not usually result in excessive bleeding. Usually, these wounds close fairly quickly without any intervention.