anatomy of nose

ANATOMY OF NOSE

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PARTS OF NOSE

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External nose:

• Osteocartilagenous framework•bony part•cartilaginous part

• Nasal musculature

• Nasal skinpgmedicalworld.com

OSTEOCARTILAGINOUS FRAMEWORK

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Internal nose:

• Vestibule of nose

• Nasal cavity proper• Lateral wall• Medial wall• Roof• Floor• Choanae

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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.

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Lateral wall

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Structures on lateral wall of nose

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Medial wall• Columellar septum

• Membranous septum

• Septum proper

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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

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Arterial supply

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Venous drainage

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Nerve supply

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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

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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.

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THANK YOU

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