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.
Scars are the result of your body healing itself from an injury- or surgery-based wound, according to MayoClinic.com. Permanent scars are commonly seen after burns, cuts and sores. They are formed when skin cells and tissues, called fibroblasts, multiply to repair the damaged cells.