Pharynx And Larynx Flashcards
At which level does the pharynx becomes continuous with the esophagus?
Opposite the 6th cervical vertebrae
How does the pharynx is connected to the tympanic membrane?
By the auditory tube
What are the muscles that form the wall of the pharynx?
1- superior, middle, inferior ( lower part called cricopharyngeus ) constrictor muscles. Fibers run in a circular direction
2- stylopharyngeus and salpingopharyngeus. Fibers run in a longitudinal direction
The lower part of the inferior constrictor muscle, which arises from the cricoid cartilage.
The cricopharyngeus muscle
What is killian’s dehiscence?
Area on the posterior pharyngeal wall, between the upper propulsive part of the inferior constrictor muscle and the lower sphincteric part, the cricopharyngeus.
Part of the pharynx lies above the soft palate and behind the nasal cavities.
The nasal pharynx
Where does the pharyngeal tonsils located?
In the submucosa of the roof of the nasal pharynx
Where does the auditory tube located?
On the lateral wall of the nasal pharynx
Where does the palatine tonsils located?
Between the palatoglossal fold and the palatopharyngeal fold
The interval between the two palatoglossal folds, and marks the boundary between the mouth and the tongue.
Oropharyngeal isthmus
What forms the lateral wall of the laryngeal pharynx?
The thyrohyoid membrane and the thyroid cartilage
All the muscles of the pharynx are supplied by the pharyngeal plexus, except.
The stylopharyngeus muscle, by the glossopharyngeal nerve CN 9
A muscle of the pharynx aids in raising the the soft palate to close the nasal pharynx.
The superior constrictor muscle
A muscle works as a sphincter at the lower end of the pharynx.
The cricopharyngeus muscle
What is the sensory nerve supply of the pharyngeal mucous membrane?
Nasal pharynx: the maxillary nerve (V2).
Oral pharynx: the glossopharyngeal nerve (CN 9) (same nerve that supply the stylopharyngeus muscle).
Laryngeal pharynx: the internal laryngeal nerve (branch of the vagus).
What is the blood supply of the pharynx?
Ascending pharyngeal arteries - tonsillar branches of facial arteries - branches of maxillary and lingual arteries.
What is the lymph drainage of the pharynx?
Directly: into the deep cervical lymph nodes.
Indirectly: via the retropharyngeal or paratracheal nodes
What are the structures that lies lateral to the superior constrictor muscle?
1- the styloglossal muscle.
2- the loop of the facial artery.
3- the internal carotid artery.
What is the blood supply of the palatine tonsils?
Arteries:The tonsillar branch of the facial artery.
Veins: the external palatine, pharyngeal or facial veins.
What forms the Waldeyer’s ring of lymphoid tissue?
- Palatine and tubal tonsils laterally.
- Pharyngeal tonsil superiorly.
- Lingual tonsil inferiorly.