Final answer:
The major salivary glands that produce most saliva outside of the oral cavity are the parotid, submandibular, and sublingual glands. They release saliva through ducts into the mouth, with the submandibular glands delivering saliva through the submandibular duct.
Step-by-step explanation:
Most saliva is produced by multicellular exocrine glands located outside the oral cavity. These major salivary glands are known as the parotid, the submandibular, and the sublingual glands. They produce the majority of saliva and deliver it into the mouth through various ducts. Among the major salivary glands, the submandibular glands, located in the floor of the mouth, release saliva through the submandibular duct. These glands, along with smaller ones in the lips, cheeks, palate, and tongue, ensure that saliva is always present to moisten the mouth and begin the process of digestion.