The oral cavity is bounded anteriorly by the teeth and lips and posteriorly by the ______.

• A. epiglottis
• B. nasal cavity
• C. larynx
• D. oropharynx

Answer: (D)

Verified step by step guidance

1. Step 1: Begin by understanding the anatomy of the oral cavity. The oral cavity is the space inside the mouth that is involved in processes like chewing, speaking, and breathing.
2. Step 2: Identify the anterior boundaries of the oral cavity. These include the teeth and lips, which form the front part of the cavity.
3. Step 3: Consider the posterior boundary of the oral cavity. This is the area where the oral cavity transitions into the pharynx, specifically the oropharynx.
4. Step 4: Learn the role of the oropharynx. The oropharynx is part of the pharynx and serves as a passageway for food and air, connecting the oral cavity to the esophagus and trachea.
5. Step 5: Compare the other options (epiglottis, nasal cavity, larynx) to understand why they are incorrect. The epiglottis is part of the larynx, the nasal cavity is above the oral cavity, and the larynx is involved in voice production and breathing, not directly bounding the oral cavity.