Tissue: A group or layer of cells that perform specific functions. For example, muscle tissue is a group of muscle cells.issue: A group or layer of cells that perform specific functions. For example, muscle tissue is a group of muscle cells.
1 The skin is a barrier to the outside world protecting the body from infection, radiation, and extremes of temperature.  There are many types of wounds that can damage the skin including abrasions, lacerations, rupture injuries, punctures, and penetrating wounds.
Other Types of Wounds. There are certainly other types of wounds not included in the 5 categories discussed. Some examples of other types of wounds include: -- contusion, commonly known as a bruise. -- thermal, chemical or electrical burn. -- penetrating wound, which extends into an internal organ or body cavity. -- skin ulcers, a type of chronic cavitary skin sore.