It’s not in the GI tract, but celiac disease is associated with a condition showing granular deposition of IgA in this organ’s papillae. Several diseases of this organ can be distinguished using the Nikolsky sign. Aromatic anticonvulsants and bactrim can cause full thickness necrosis of this organ in Stevens-Johnson syndrome. Lupus can cause discoid lesions in this organ. Antibodies targeting this organ’s BP180 and BP230 antigens cause bullous pemphigoid, which destroys the (-5[1])hemodesmosomal junction. (*) Merkel disks and Meissner’s corpuscles are mechanosensors in this (10[1])organ. The stratum (-5[1])spinosum, stratum basale, and stratum corneum are layers of this organ, which contains keratinocytes bound to a basement membrane. This organ contains the sebaceous and (10[1])sweat glands. For 10 points, name this largest organ in the human body, whose outer layer is the epidermis. (10[2])■END■