Final answer:
The parotid gland has an easily noted opening due to a high elevation of mucous membrane. Salivary glands produce saliva, which lubricates food and contains digestive enzymes.
Step-by-step explanation:
The parotid gland has an opening that is easily noted because of a high elevation of mucous membrane. Salivary glands are responsible for producing saliva, which lubricates food and contains digestive enzymes. The major salivary glands are the parotid, submandibular, and sublingual glands. Each gland secretes a unique formulation of saliva according to its cellular makeup.