Question

multiple choice question
the lateral walls of the oral cavity are formed by the cheeks, which are covered externally by the ____ and contain the ____ muscles.
o mesothelium; masseter
o endothelium; buccinator
o skin; masseter
o integument; buccinator

Explanation:

• Mesothelium: Lines body cavities, not the cheeks' external surface.
• Endothelium: Lines blood vessels, not relevant here.
• Skin (Integument): The external covering of the body, including cheeks.
• Masseter: A muscle for jaw - closing, not primarily in the cheek's structure.
• Buccinator: A muscle in the cheek that helps with functions like blowing and keeping food between teeth.

Answer:

integument; buccinator