Confidence votes 20.5K. All the halogens (periodic column 17) oxygen, and sulfur. Silver can also form alloys with many other metals, but these are not usually considered chemical reactions because they do not always produce compounds with constant composition. All the halogens (periodic column 17) oxygen, and sulfur.
The mucosa covering the upper surface of the tongue is thrown into numerous projections called the lingual papillae in the anterior 2/3rd of the tongue. In the posterior 1/3rd, there are no papillae, but there are lots of lymphoid follicles present. The three types of papillae are: fungiform (mushroom like)
Learning Objectives. 1  Know the location and histological similarities and dissimilarities among the different types of oral mucosae (lining, masticatory, specialized). 2  Know the histology of the tongue including the different types of papillae.