Answer: Wound eschar
Step-by-step explanation:
A wound eschar can be define as a mass of dead tissue that sloughs off from a healthy skin after an injury occurs. It is a slough off piece of dead tissue that actually casts off typically from the surface of the skin. It occurs typically after a burn injury but can also be seen cases of ulcer, spider or tick bites, fungal infection, and gangrene.
As a result of tissue destruction in depth, the wound eschar formed by any of the above mentioned reason appears as a layer covered by black or gray nonviable denatured collagen.