Final answer:
The salivary glands in the tongue open through papillae in the oral cavity on either side of the lingual frenulum.
Step-by-step explanation:
The student's question is related to the salivary glands and their openings in the oral cavity. Each gland opens through a papilla in the floor of the oral cavity on either side of the lingual frenulum. These papillae are part of the lingual glands in the tongue, which secrete mucus and a watery serous fluid that contains the enzyme lingual lipase. The lingual frenulum is a fold of mucous membrane that attaches the bottom of the tongue to the floor of the mouth.