CHAPTER X. 

 ALIMENTARY CANAL. 



Tongue. T.S. Kitten, (p. 3, inj., s. 22 & 24 c. P., m. B.) (L) 

 The dorsal surface of the organ is fringed with papillce, which 

 are absent elsewhere. The superficial stratified epithelium has 

 beneath it fibrous tissue, these together constitute the "Mucosa," 

 the papillse being formed by projections of the two layers. 

 Internally the organ is muscular and is divided symmetrically 

 into lateral halves by a thin fibrous septum (Raphe). Note the 

 strata of the transverse muscle alternating with those of the 

 vertical muscle. The fibres of these are attached to the septal 

 and mucosal fibrous tissue. The other intrinsic muscles are 

 the dorsal and inferior linguals. Near the latter find sections 

 of small blood vessel and nerves. (//) Examine the conical 

 papillae, observe the fibrous core and the enveloping squamous 

 epithelium. Search the sub-mucosa for mucous glands, there will 

 be none unless the section is taken from the hinder part of 

 the tongue. 



Tongiie. "V. S. Middle of dorsum, Man. for Fungiform papillae. 

 (p. 11, s. 22 & 24, c. P., m. B.) (L) and (//) The papilla in 

 question are shaped like button mushrooms, the surface of the 

 fibrous core exhibits small secondary papillae. 



Tongue, V.S., base of, Man. for circumvallate papillae, (p. 21, 

 s. 22 & 24, c. P., m. B). .(L) Find a circumvallate papilla and 

 study its structure in conjunction with that of the corresponding 

 organ in the next preparation, the details of which are better 

 preserved as the tissue can be fixed in a fresher condition. 



