(A) Apex-corpus view of the tongue ( 6-7 weeks). Triple stain. Scale bars: 500µm. , (B) Apex-corpus view of the tongue in the stud, Triple stain. Scale bars: 500µm. (C) Apex view of the tongue ( 6-7 weeks). PAS. Scale bars: 500µm. (D) Mucous glands of the stud. PAS. Scale bars: 500µm. Sb) Serous glands, a) parakeratinized epithelium, Mb) Mucous glands, K) Hyaline cartilage.