Afull-thickness pressure injury is covered by a layer of black nonviable, denatured collagen. what term is used to describe this condition?

Wound eschar

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.

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it's a nutrition food for pregnant mothers so they unborn child can get its nutrition that it needs to grow in to a healthy baby.

explanation:

and the mother is getting all of her nutrition and her calcium and vitamins .