The lamina propria and mucous epithelium are components of the

Mucosa

Explanation:

Mucosa is also known with the term mucous membrane which is a membrane that lines various cavities of our body and also forms a protective covering on the surface of many internal organs of our body. Its constituents are as follows -

Mucous epithelium - it is one or more layer formed of epithelial cells Lamina propria - it a layer formed by the loose connective tissue

The mucosa has been found to be endodermal in origin and sometimes it is also involved in the secretion of mucus.