A goblet cell is a glandular simple columnar epithelial cell whose function is to secrete mucus. Lysozyme is an enzyme characterized by the ability to break down the bacterial cell wall to improve protein or nucleic acid extraction efficiency. The sublingual glands are salivary glands that lie in the floor of the mouth anterior to the submandibullar glands. Parietal cells (also known as oxyntic or delomorphous cells), are the stomach epithelial cells that secrete gastric acid (HCl) and intrinsic factor.