mouth

what type of epithelial cells line the oral cavity?

stratified squamous

what is the space between the lips called?

oral fissure

draw a labelled diagram of the mouth

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

where is the hard palate?

roof of the mouth anteriorly

where is the soft palate?

roof of the mouth posteriorly

what are the cheeks made up of? (2)

- buccinator muscle
- interiorly lined by mucous membrane

what muscles lies on the floor of the mouth? (2)

mylohyoid muscles
geniohyoid muscles

what do the geniohyoid and mylohyoid muscles do?

pull the larynx forward during swallowing

what are the 2 divisions of the oral cavity?

- vestibule
- oral cavity proper

what is the vestibule?

space anterior to 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 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 and nasopalatine nerves which 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 the intrinsic muscles of the tongue do?

control the shape and size of the tongue

what do the extrinsic muscles of the tongue do?

allow movement 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?

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?

facial nerve (CN VII)

what innervates the posterior 1/3 for taste and general sensation?

glossopharyngeal nerve (CN IX)

what arteries supply the tongue?

lingual artery

what veins drain the tongue?

lingual vein

where is the parotid gland?

in the parotid region, anterior to the ear

where is the sublingual gland?

floor of oral cavity, underneath the tongue

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 submandibular gland secrete?

- serous and mucous saliva
- 70% saliva production

what does the sublingual gland secrete?

- mostly mucous, some serous saliva
- 5% saliva production

what nerves supply the parotid gland?

the glossopharyngeal nerve (CN IX)

what nerves supply the submandibular 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 external carotid artery

what vein drains the parotid gland?

retromandibular vein

what arteries supply the submandibular and sublingual glands? (2)

submental artery - a branch of the facial artery
sublingual artery - a branch of the lingual artery

what veins drain the submandibular and sublingual glands? (2)

facial vein
sublingual vein