Pharynx Flashcards
what are the three parts of the pharynx?
- nasopharynx
- oropharynx
- laryngopharynx
What are the borders of the nasopharynx?
- posterior border of nasal septum
- soft palate
what are the boundaries of the oropharynx?
- from soft palate & base of tongue
- to superior border of epiglottis
what are the boundaries of the laryngopharynx?
- superior border of epiglottis
- to inferior border of cricoid cartilage
what are tonsils?
lymphoid tissue
what tonsils form Waldeyer’s ring?
- pharyngeal tonsils
- tubal tonsils
- palatine tonsils
- lingual tonsils
what part of the pharynx are the adenoid tonsils located?
nasopharynx
what is the function of the pharyngobasilar fascia?
holds the nasopharynx open
how many pharyngeal constrictor muscles are there? name them:
Three:
- superior constrictor
- middle constrictor
- inferior constrictor
what is the function of the pharyngeal elevators?
lifts the pharynx to receive the food bolus from oral cavity
what nerve supples the pharyngeal constrictor muscles?
the vagus nerve (CNX) via the pharyngeal plexus
what is the lower circular part of the inferior pharyngeal constrictor known as?
the cricopharungeus
what is the function of the cricopharyngeus?
forms a sphincter around upper oesophagus preventing air being drawn into the stomach during inhalation
what are the names of the pharyngeal elevator muscles?
- palatalpharyngeus
- stylopharyngeus
- salpingopharyngeus
what is the function of the palatopharyngeus muscle?
- elevates pharynx & larynx
- draws soft palate downwards
