It’s not in the GI tract, but celiac disease is associated with a condition showing granular deposition of IgA in (15[1])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 (-5[1])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 (10[1])Meissner’s (10[1])corpuscles are mechanosensors in this organ. The stratum spinosum, stratum basale, and stratum corneum are layers of this organ, which contains (10[1])keratinocytes bound to a basement membrane. This organ contains the sebaceous and sweat glands. For 10 points, name this largest organ in the human body, whose outer layer is the epidermis. (10[2])■END■