The oral cavity and salivary glands

Question 1

what are the 3 salivary glands

Answer 1

• Parotid
• Submandibular
• Sublingual

Question 2

what are the bounds of the oral cavity

Answer 2

• Anteriorly by the lips.
• Posteriorly by the vertical plane connecting the posterior free edge of the palate down to the epiglottis,
• The Roof: is formed by the palate which has two parts: Hard Palate (made of the palatine process of the maxilla and the horizontal plate of the palatine bone), and Soft Palate (made of fibrous tissue and with muscle fibres from the muscles that move it, levator palatini – tensor palatini – musculus uvulae, the latter moves the Uvula.
• The Floor: is formed by the Tongue.

Question 3

what is the vestibule

Answer 3

this is the space between the teeth and the cheek

Question 4

what is the oral cavity proper

Answer 4

the space located inside the teeth is called the Oral cavity proper.

Question 5

when is the frenulum

Answer 5

fold of mucosa called the Frenulum which attaches the tongue to the mouth floor

Question 6

describe the structure of the parotid gland and where it is

Answer 6

The Parotid gland occupies the triangular space made by the ramus of the mandible, the external ear and the upper part of the sternomastoid muscle, the facial nerve and its branches will traverse this gland and divide it to superficial large part and a smaller deep one.

Question 7

what is the parotid gland covered in

Answer 7

• covered with a tough non expandable fascia

Question 8

where is the submandibular gland

Answer 8

• it sits in the digastrics triangle
• Its superficial and deep parts, take a “U” shape around the posterior (free) border of the Mylohyoid muscle. T
• he deep part ends with the submandibular duct that opens on the mouth floor next to the frenulum

Question 9

where is the sublingual gland

Answer 9

• they are on each side of the tongue
• ## they open with separate ducts on the place sublingual

Question 10

what is the place sublingual

Answer 10

fold of mucous membrane between the tongue and the body of the mandible.

Question 11

describe the teeth

Answer 11

There are 32 permanent teeth in the mouth of a human being, 2 Incisors, 1 Canine, 2 Premolars, 3 Molars

Question 12

how are teeth attached to the jaw

Answer 12

• they are attached to their socket in the alveolar part of the mandible with the periodontal membrane

Question 13

what does the auriculo- temporal nerve do

Answer 13

• it is a branch of the mandibular nerve (a branch of the trigeminal ) which carries to the gland sensory and secret-motor fibres

Question 14

what is the sensory fibres of the parotid gland

Answer 14

the sensory fibres are supplied by the trigeminal through the mandibular nerve V3.

Question 15

what are the secreto-motor fibres of the parotid gland

Answer 15

the secreto-motor (parasympathetic) fibres are supplied by the glossopharygeal nerve ( CNIX) through the lesser petrosal nerve, these fibres will synapse in the Otic ganglion to become postganglionic before they join the auriculotemporal nerve

Question 16

what are secreto-motor innervation of the submandibular and sublingual glands

Answer 16

• provided by the chord tympani 0 this is a branch of the facial nerve CNVII

Question 17

what does the chord tympani do

Answer 17

• carries secret-moron fibres to the glands
• taste sensations from the anterior 2/3 of the tongue
• joints the lingual nerve for some distance then the secreto-motor fibre will separate and go to the submandibular ganglion this will innervate the two glands