Henry Gray (18251861). Anatomy of the Human Body. 1918.
Section through one of the crypts of the tonsil. (Stöhr.) Magnified. e. Stratified epithelium of general surface, continued into crypt. f, f. Nodules of lymphoid tissueopposite each nodule numbers of lymph cells are passing into or through the epithelium. s, s. Cells which have thus escaped to mix with the saliva as salivary corpuscles.