HEAD NECK
ORAL CAVITY AND TONGUE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The lips and cheeks are covered internally with the skin, and lined externally with the mucous membrane.
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true
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false
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -The oral mucosa is the mucous membrane lining or “skin” inside of the mouth, including cheeks and lips.
Detailed explanation-2: -The vermilion of the lips is comprised of a modified mucous membrane composed of hairless, highly vascularized, nonkeratinized stratified squamous epithelium. This membrane is three to five cellular layers in thickness, in contrast to the 16-layer facial skin.
Detailed explanation-3: -The vestibule – the space between the soft tissue (lips and cheeks), and the teeth and gums. The vestibule is kept moist by secretions from the parotid salivary glands, which are located in front of the ears and behind the angle of the jaw.
There is 1 question to complete.