Anatomy of nose
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The nose has external and internal parts. The external nose contains bone and cartilage that form its framework, while the internal nose contains vestibules, cavities, and walls. The internal lining contains mucous membranes that vary from skin to thicker areas. The lateral and medial walls contain important structures and the roof and floor have specific bone formations. Arteries supply blood, veins drain it, and nerves provide sensation and control. Lymphatic drainage occurs to nearby lymph nodes.
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Anatomy of nose
- 3. External nose: • Osteocartilagenous framework • bony part • cartilaginous part • Nasal musculature pgmedicalworld.com
- 5. Internal nose: • Vestibule of nose • Nasal cavity proper • Lateral wall • Medial wall • Roof • Floor • Choanae pgmedicalworld.com
- 6. LINING MEMBRANE OF INTERNAL NOSE • Vestibule:- − Lined by skin containing hair, hair follicles, sebaceous glands. • Olfactory region:- − Mucous membrane. • Respiratory region:- − Mucous membrane shows varible thickenings. pgmedicalworld.com
- 8. Structures on lateral wall of nose pgmedicalworld.com
- 9. Medial wall • Columellar septum • Membranous septum • Septum proper pgmedicalworld.com
- 10. Roof •Anterior slope •Middle horizontal •Posterior slope •Ant. 3/4th formed by palatine process of the maxilla •Post. 1/4th formed by the palatine bone. Floor pgmedicalworld.com
- 14. NERVE SUPPLY • Olfactory nerves • Nerves of common sensation • Ant. Ethmoidal nerve • Branches of sphenopalatine ganglion • Branches of infra-orbital nerve • Autonomic nerves • Parasympathetic-greater superficial petrosal nerve • Sympathetic-from T1 & T2 pgmedicalworld.com
- 15. LYMPHATIC DRAINAGE • From ext. nose & ant. Part of the nasal cavity : into submandibular nodes. • Rest of the nasal cavity : upper jugular nodes either directly or through the retropharyngeal nodes. pgmedicalworld.com