True: Contusion is a black and blue marks where blood has escaped from circulation and formed blood clots in the tissue(hematomas), The papillary layer of the dermis consists of areolar connective tissue with collagen and elastic fibres., The nail bed is a portion of the living skin that supports the nail plate as it grows towards the free edge., Melanoma is a cancerous melanocyte cells that spread quickly and are most dangerous (50% survival rate), Gangrene is a death tissue associated with loss of blood supply., Keloid is a thick scar resulting from excessive growth of fibrous tissue., The skin is able to synthesize vitamin D when exposed to sunlight., False: The sebaceous gland produces a wax in the external ear canal., Keratin is the skin pigment that protects it against ultraviolet light., The epidermis contains sensory receptor,

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