The word salivary gland is used to collectively describe a large group of organs in the mouth and throat. The primary purpose of these glands is the secretion of saliva. Saliva is a mixture of water, mucous membranes, antibacterial agents and enzymes of most mammals. This substance begins to break down starch and fat, which initiates the process of digestion with chewing. They can start in the mouth, neck or throat glands. The salivary glands produce saliva that aids in absorption maintains moisture in the mouth and supports healthy teeth.