Flip-flops and latches are used as data storage elements. A flip-flop stores a single bit (binary digit) of data; one of its two states represents a one and the other represents a zero. Such data storage can be used for storage of state, and such a circuit is described as sequential logic.
1 Incisional hernia can occur through a scar if you have had abdominal surgery in the past. 2  Umbilical hernia is a bulge around the belly button. 3  It occurs when the muscle around the belly button does not close completely after birth.
A few common scars include: 1  Burn scars. Severe burns that destroy large sections of skin cause the skin to heal in a puckered way. 2  Keloid scars are a result of the skin's overproduction of collagen after a wound has healed. These scars generally appear as growths in the scar site.