Final answer:
Intrinsic salivary glands are unicellular glands that continuously secrete saliva in the mouth, independent of stimuli. Saliva is important for moistening food and initiating digestion.
Step-by-step explanation:
Intrinsic salivary glands are unicellular glands that continuously release relatively small amounts of secretions independent of the presence of stimuli. These glands are part of the many salivary glands in the mouth that constantly secrete saliva. Saliva is essential for moistening food, initiating the chemical breakdown of carbohydrates, and providing lubrication for the mouth and teeth. The secretion of saliva increases when you eat to aid in the digestion process.