176 NORMAL HISTOLOGY AND ORGANOGRAPHY. 



red color. They are most numerous at the tip and 

 margins of the tongue. Each is like an inverted 

 cone and has a covering of eight or ten layers of 

 squamous epithelial cells. Many of these papillae 

 have taste buds in their lateral walls, analogous to 

 those to be described in the third class of papillae 

 the circumvallate. A connective-tissue papilla oc- 

 cupies the core of the fungiform. This core has a 

 rich supply of blood-vessels which in fevers become 

 congested with blood and give the dorsum a 



Fig. 127. Section of fungiform papilla of tongue. 



speckled red color, spoken of as strawberry tongue 

 This is particularly the case in scarlet fever. 



3. Circumvallate Papilla. These are by far th 

 largest and are found just in front of the foramen 

 cecum. They are about ten in number and are ar- 

 ranged in the form of a letter V, with the apex point- 

 ing backward. They resemble the fungiform pa 

 pillae, only they are much larger. Each papilla is 

 surrounded by a deep, narrow, circular trench or 



