Easy to produce scars after injury

Introduction: Human skin is divided into epidermis and dermis. There are many tissues in the dermis, such as sebaceous glands, sweat glands, nerve endings, etc. After the epidermis is damaged, it can be repaired by itself. After injury, the tissue will break after injury to the dermis. At other times, other tissues are needed for repair, and scars will appear after the repair is completed.

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