Anatomy Of The Oral Cavity And Pharynx Flashcards
(24 cards)
What are the lateral walls of the oral cavity?
Buccinator muscles
What forms the roof of the oral cavity?
Hard and soft palate
What forms the floor of the oral cavity?
Tongue
Where does the oral cavity extend to posteriorly?
Oropharyngeal isthmus
Which two muscles form the oropharyngeal isthmus?
Palatopharyngeal and palatoglossus
How do we keep food in the oral cavity during mastication?
Contraction of palatoglossus and palatopharyngeal pulls soft palate down towards back of tongue
Which tonsils make up waldeyer’s ring?
Adenoid (pharyngeal), palatine and lingual tonsils
What are the three major functions of the oral cavity (mouth)?
Digestion, communication and breathing
Where does the duct of the parotid gland open into the oral cavity?
Opposite the upper second molar tooth
What is the function of the mylohyoid and geniohyoid muscles?
Pulls the larynx forward during swallowing
Which salivary gland is most susceptible to sialoliths?
Sub mandibular
What is a sialolith?
A calcified deposit forming in a salivary gland which may cause blockage of a duct
What is the fold of oral mucosa connected the tongue to the floor of the oral cavity?
Frenulum
What are the actions of the intrinsic muscle of the tongue?
Alter the shape of the tongue
What is the action of the extrinsic muscles of the tongue?
Alter position of the tongue e.g protrusion
How many muscles make up the tongue?
4 intrinsic, 4 extrinsic
What are the two bellies of the inferior constrictor muscle?
Thyropharyngeus, cricopharyngeus
What is the weak point known as located between the two bellies of the inferior constrictor muscle?
Killian’s dehiscence
What structures are found within the nasopharynx?
The adenoids (pharyngeal tonsils) and opening of the Eustachian tube
What is the sensory nervous supply of the nasopharynx?
Maxillary division of the trigeminal nerve
Where does the oropharynx extend from and to where?
From soft palate to epiglottis
what is the sensory innervation of the oropharynx and the Eustachian tube?
Glossopharyngeal nerve
What is thhhe sensory innervation of the laryngopharynx?
Vagus nerve
Where are the palatine tonsils located?
Between the palatoglossus and palatopharyngeus arches
