NOSE

ByAsmah BiranNormala TalibMaryani Mohd Hashim

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PARTS OF NOSE

The Figure Of Nose

External nose:Osteocartilagenous frameworkbony partcartilaginous part

Nasal musculatureNasal skin

OSTEOCARTILAGINOUS FRAMEWORK

Internal nose:Vestibule of nose

Nasal cavity properLateral wallMedial wallRoofFloorChoanae

LINING MEMBRANE OF INTERNAL NOSEVestibule:-Lined by skin containing hair, hair follicles, sebaceous glands.Olfactory region:-Mucous membrane.Respiratory region:-Mucous membrane shows varible thickenings.

Lateral wall

Structures on lateral wall of nose

Medial wallColumellar septum

Membranous septum

Septum proper

Roof Anterior slope

Middle horizontal

Posterior slope

Ant. 3/4th formed by palatine process of the maxillaPost. 1/4th formed by the palatine bone.Floor

Arterial supply

Venous drainage

Nerve supply

NERVE SUPPLYOlfactory nerves

Nerves of common sensationAnt. Ethmoidal nerveBranches of sphenopalatine ganglionBranches of infra-orbital nerve

Autonomic nervesParasympathetic-greater superficial petrosal nerveSympathetic-from T1 & T2

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.

Functions of the nose

Breathing

Air flows in and out during normal breathing. The inner lining of the nose has many blood vessels at the surface. Blood flowing through your nose warms the air as your breathe in. Your nose also humidifies the air before it gets to your lungs.

Cleansing The nose has many small hairs inside the nostrils. These hairs act as a filter, removing dirt and particles before the air enters the lungs. Sneezing and nose blowing also help remove the particles out of your body.

Smell

Smell is one of the most important functions of the nose. The sense of smell is not completely understood. Smell is a key component of memory, physical attraction and emotional connections. The olfactory nerves are cranial nerves that allow communication between your nose and brain. Conditions, such as a cold, will decrease your sense of smell. Some people suffer from a condition called anosmia, which is the inability to smell.

THANK YOU

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