This is a valuable treatise on the Mucous Membranes by Xavier Bichat, a French anatomist, and pathologist known as the father of modern histology. A mucous membrane or mucosa occupies the interior of the cavities, which, through various openings such as the eyes, eyelids, ears, nose, mouth, lips, genital areas, the urethral opening, and the anus. In addition, some mucous membranes secrete mucus, a protective fluid. The function of the membrane is to block pathogens and dirt from entering the body and prevent bodily tissues from becoming dehydrated. Bichat accurately presented the information in a comprehensible manner and gave valuable insights into the important subject of human biology. Contents include: Of the Situation and Number of Mucous Membranes Of the Exterior Organization of Mucous Membranes Of the Interior Organization of Mucous Membranes Of the Glands of Mucous Membranes Of the Vascular System of Mucous Membranes Of the Variations in the Organization of Mucous Membranes Of the Vital Powers of Mucous Membranes Of the Sympathies of Mucous Membranes Of the Functions of Mucous Membranes Remarks on the Affections of Mucous Membranes