Pharynx Flashcards
BS of hard palate
- Greater palatine branch of maxillary A
Drain into pterygoid venous plexus
NS of hard palate
Greater palatine and nasopalatine branches of pterygopalatine ganglion
Lymphatics of hard palate
Upper cervical lymph nodes
Retropharyngeal lymph nodes
Passavant’s ridge
- Upper fibres of palatopharyngeus pass deep to mucous membrane to form sphincter internal to sup. constrictor
- Raises a ridge called passavants ridge
- When soft palate is elevated, it comes into contact with this ridge
BS of soft palate
- Greater palatine branch of maxillary A
- Ascending palatine branch of facial A
- Palatine branch of ascending pharyngeal A
Pterygoid and tonsillar venous plexus
Lymphatics of soft palate
Upper deep cervical
Retropharyngeal
Boundaries of pharynx
A: Nasal, oral cavity, larynx P: Prevertebral fascia S: Base of skull, body of sphenoid I: continues with oesophagus Sides: 1. Medial pterygoid plate 2. Mandible 3. Tongue 4. Hyoid bone 5. Thyroid, cricoid cartilage 6. Styloid process 7. Carotids
Location of palatine tonsil
tonsillar sinus b/w palatoglossal and palatopharyngeal arches
Medial surface of palatine tonsil
- stratified squamous epithelium
- 12-15 crypts
- large crypts called intratonsillar clefts
Lateral surface of palatine tonsil
- extension of pharyngobasilar fascia forms hemicapsule
- pierced by tonsillar A
Bed of tonsil
In to out
- Pharyngobasilar fascia
- Superior constrictor
- Palatopharyngeus
- Buccopharyngeal fascia
- Styloglossus
- Glossopharyngeal N
BS of palatine tonsil
- Tonsillar branch of facial A
- Ascending palatine branch of facial
- Dorsal lingual A
- Ascending pharyngeal branch
- Greater palatine A
Lymphatics of palatine tonsil
Jugulodigastric node
Nerve supply of palatine tonsil
Glossopharyngeal
Lesser palatine
Layers of pharyngeal wall
In to out
- Mucosa
- Submucosa
- Pharyngobasilar fascia - thick in part b/w sup. constrictor and skull
- Muscular - 6 muscles
- Pharygeal plexus of nerves and veins
- Buccopharyngeal fascia