Medical Integumentary System
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Crust
Dry pus or blood covering an injury; such as a scab
Macule
Flat, discolored spot on the skin; such as a freckle
Wheal
Itchy, raised area with an irregular shape; such as a hive
Ulcer
Open sore with deep loss of skin surface
Pustule
Pus-filled, raised sac; such as acne
Vesicle
Raised, fluid-filled sac; such as a blister
Papule
Raised, solid area less than 1 cm in diameter