This lubricative function of saliva allows the food bolus to be passed easily from the mouth into the esophagus.

Orange luxin is slick, lubricative, and heavy.

Application of any kinds of lubricative substances on any bodypart except the face is disallowed.

The lubricative properties arise from the high lipid content of the sebum produced by the sebaceous glands.

Furthermore, saliva serves a lubricative function, wetting food and permitting the initiation of swallowing, and protecting the mucosal surfaces of the oral cavity from desiccation.

The lubricative fluid contains water, pyridine, squalene, urea, acetic acid, lactic acid, complex alcohols and glycols, ketones, and aldehydes.

While serous membranes have a lubricative role to play in all three cavities, in the pleural cavity it has a greater role to play in the function of breathing.