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about nose
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NOSE
ByAsmah BiranNormala TalibMaryani Mohd Hashim
erma7a
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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