520. The lamina propria is:

 A.  epithelial tissue 
 B.  connective tissue 
 C.  adipose tissue 
 D.  muscle tissue 

The correct answer is B. The lamina propria is a loose connective tissue located within the mucosal
layer, just underneath the epithelium. In the oral cavity, it will be found below the outer layer of
stratified squamous epithelium. The lamina propria in the oral cavity  often forms wedge-like
extensions into concavities in the epithelium, known as connective tissue papillae. The corresponding
epithelial extensions into the connective tissue are known as rete pegs.


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