ANATOMY OF NOSE

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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 skin

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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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