The Mouth

What type of epithelial cells line the oral cavity?

Stratified Squamous

What is the space between the lips called

Oral fissure

What attaches the upper lip to the gingivae

Superior labial frenulum

What attaches the lower lip to the gingivae

Inferior labial frenulum

What is the purpose of the uvula

To prevent food from entering the nasal cavity

What separates the oral and nasal cavity?

The hard and soft palate

What are the cheeks made up of?

• Buccinator muscle

• Interiorly lined mucous membrane

What muscles lie on the floor of the mouth?

• Mylohyoid muscles

• Geniohyoid muscles

What do the geniohyoid and mylohyoid muscles do?

Pull the larynx forwards during swallowing

What are the 2 divisions of the oral cavity?

• Vestibule

• Oral cavity proper

What is the vestibule?

Space anterior to the teeth

What is the diameter of the vestibule controlled by?

• Muscles of facial expression

  • Obicularis oris

Where is the oral cavity proper?

Space posterior to the teeth

What is the main nerve supplying the oral cavity?

Trigeminal nerve (CN V)

What nerves does the trigeminal nerve (CN V) branch into?

• Ophthalmic branch (CN V₁)

• Maxillary branch (CN V₂)

• Mandibular branch (CN V₃)

Which nerves supply the hard palate?

• The greater palatine nerves

• The nasopalatine nerves

  • They are branches of the maxillary nerve (CN V₂)

Which nerves supply the soft palate?

The lesser palatine nerve which is a branch of the maxillary nerves (CN V₂)

Which nerve supplies the floor of the mouth

The lingual nerve which is a branch of the mandibular nerves (CN V₃)

Which nerves supply the cheeks?

The buccal nerve which is a branch of the mandibular nerves (CN V₃)

What do intrinsic muscles of the tongue do?

Control the shape and size of the tongue

What innervates the intrinsic and extrinsic muscles of the tongue?

Hypoglossal nerve (CN XII)

What innervates the anterior 2/3 for general sensation?

• The lingual nerve

• A branch of the mandibular nerve (CN V₃)

• A branch of the trigeminal nerve (CN V)

What innervates the anterior 2/3 for taste

The facial nerve (CN VII)

What innervates the posterior 1/3 for taste and general sensation

Glossopharyngeal nerve (CN IX)

What arteries supply the tongue?

The lingual artery

What veins drain the toungue?

The lingual vein

Where is the parotid gland?

In the parotid region, anterior to the ear

Where is the submandibular gland?

• Posterior to the sublingual gland

• Inferior to the mandible

What does the parotid gland secrete?

• Serous saliva

• 25% saliva production

What does the mandibular gland secrete?

• Serous saliva

• Mucous saliva

• 70% saliva production

What does the sublingual gland secrete?

• Mostly mucous saliva

• Some serous saliva

• 5% saliva production

What nerves supply the parotid gland?

The glossopharyngeal nerve (CN IX)

What nerves supply the mandibular gland?

The facial nerve (CN VII)

What nerves supply the sublingual gland?

The facial nerve (CN VII)

What arteries supply the parotid gland?

Branches of the external carotid artery

What vein drains the parotid gland?

The retromandibular vein

What arteries supply the submandibular and sublingual glands?

• Submental artery

  • A branch of the facial artery

• Sublingual artery

  • A branch of the lingual artery

What vein drains the submandibular and sublingual glands?

• Facial vein

• Sublingual vein