Anatomy of Lips and Cheeks

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What is the main function of the orbicularis oris muscle?

To taste the food

To form a sphincter around the oral opening (correct)

To move the jawbone

To support the facial expression

What are the lips and cheeks described as?

Fatty layers

Skin layers

Musculofibrous folds (correct)

Mucous membranes

Which nerve is responsible for the sensation of the lower lip?

Trigeminal nerve

Mental nerve (correct)

Facial nerve

Infra-orbital nerve

What is the main function of the buccinator muscle?

To compress the cheeks during suckling and eating (C) Signup and view all the answers

Which artery is responsible for the blood supply of the upper lip?

Labial artery (B) Signup and view all the answers

What is the main function of the lips?

To form a sphincter around the oral opening (B) Signup and view all the answers

What are the cheeks continuous with?

Lips (D) Signup and view all the answers

Which nerve is responsible for the sensation of the cheek?

Buccal nerve (C) Signup and view all the answers

What covers the lips externally?

Skin (D) Signup and view all the answers

What does the ingual lingual vein drain to?

Internal jugular vein (A) Signup and view all the answers

What is the final destination of lymphatic drainage of the tongue?

Deep cervical nodes that pass into general circulation (C) Signup and view all the answers

What is the primary function of salivary glands?

To keep the mouth moist (A) Signup and view all the answers

How many pairs of large salivary glands are there?

Three (B) Signup and view all the answers

When do the large salivary glands primarily respond?

When food is in the mouth (A) Signup and view all the answers

Where does the duct of the parotid salivary gland enter the mouth?

Near the upper 2nd molar tooth (B) Signup and view all the answers

What type of secretion does the parotid salivary gland produce?

Serous (B) Signup and view all the answers

Where does the duct of the submandibular gland enter the mouth?

On the floor of the mouth (D) Signup and view all the answers

What is the nature of the secretion of the sublingual gland?

Mixed (mucous and serous) (C) Signup and view all the answers

What is the function of the thick hairs in the nasal opening?

To filter the incoming air (D) Signup and view all the answers

What bone separates the nasal cavity from the oral cavity?

Palatine bone (A) Signup and view all the answers

What is the function of the cilia in the nasal cavity?

To propel the mucus layer towards the nasopharynx (D) Signup and view all the answers

What is the term for the empty spaces in the nasal cavity?

Paranasal sinuses (D) Signup and view all the answers

What is the function of the paranasal sinuses?

To moisturize the surface of the nasal cavity and incoming air (A) Signup and view all the answers

What is the shape of the nasal cavity?

Irregular (A) Signup and view all the answers

What is the function of the conchae?

To force the incoming air to swirl around and slow down (A) Signup and view all the answers

What is the function of the mucosal layer in the nasal cavity?

To trap dust, bacteria, etc. (C) Signup and view all the answers

What happens to the mucus layer in the nasal cavity?

It is swallowed and then destroyed (D) Signup and view all the answers

What is the transitional zone between the lips and the surrounding skin called?

Vermilion border (D) Signup and view all the answers

What is the role of the buccinator muscle?

To push the cheek towards the teeth (D) Signup and view all the answers

Which nerve supplies the muscles in the lateral walls of the oral cavity?

Facial nerve (D) Signup and view all the answers

What is the nerve supply to the floor of the oral cavity?

Complex nerve supply including C1 and trigeminal nerve (D) Signup and view all the answers

Which nerve supplies the mucous membrane of the roof of the oral cavity?

Maxillary nerve (C) Signup and view all the answers

What is the primary role of teeth?

To break down food mechanically (A) Signup and view all the answers

How many permanent teeth are there?

32 (A) Signup and view all the answers

When do the permanent teeth erupt?

Between 6 and 18 years (A) Signup and view all the answers

What is the connection between the mouth and the oropharynx called?

Posterior oropharyngeal communication (D) Signup and view all the answers

What are the three distinct regions of a tooth?

Crown, neck, and root (A) Signup and view all the answers

What is the main function of the tongue?

All of the above (D) Signup and view all the answers

What is the posterior 1/3 of the tongue?

The root (B) Signup and view all the answers

What covers the tooth in the root region?

Cement (B) Signup and view all the answers

What is the function of intrinsic muscles in the tongue?

Changing the shape of the tongue (B) Signup and view all the answers

What is the name of the nerve that supplies the lower teeth?

Mandibular nerve (C) Signup and view all the answers

What is the special sense organ involved primarily with taste?

Tongue (D) Signup and view all the answers

What is the name of the muscle that changes the position of the tongue?

Hyoglossus (B) Signup and view all the answers

What is the term for the study of the tongue?

Glossology (A) Signup and view all the answers