Nose And Paranasal Sinusefinal
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Transcript of Nose And Paranasal Sinusefinal
Nose & Para nasal Nose & Para nasal sinussinus
PROF. DR MASOOD AHMEDPROF. DR MASOOD AHMED
MBBS,MPHIL,PHDMBBS,MPHIL,PHD
Nose & Paranasal sinus:Nose & Paranasal sinus: Describe histological features of Describe histological features of
vestibular, respiratory and olfactory vestibular, respiratory and olfactory mucosa of nose mucosa of nose
Describe histological features of mucous Describe histological features of mucous membrane Para nasal sinusesmembrane Para nasal sinuses
Identify under microscope the histological Identify under microscope the histological features of various parts of mucous features of various parts of mucous membrane of nose and para nasal sinusesmembrane of nose and para nasal sinuses..
ANATOMY OF THE NOSEANATOMY OF THE NOSE
Anatomy of the noseAnatomy of the nose
Vestibular partVestibular partFrom anterior nostrils to From anterior nostrils to
inferior conchainferior concha Respiratory partRespiratory partFrom inferior concha to From inferior concha to
the posterior nostril the posterior nostril and up to the superior and up to the superior conchaconcha
Olfactory partOlfactory part Above the superior Above the superior
concha up to the roof concha up to the roof of nose and adjoining of nose and adjoining part of septumpart of septum
Anatomy of the noseAnatomy of the nose
Skeleton of nose is made Skeleton of nose is made up of bone and up of bone and cartilages covered by cartilages covered by mucous membrane mucous membrane
Surface lining of the Surface lining of the three parts of the nose three parts of the nose has different structure has different structure depending on the depending on the functionfunction
Para nasal sinusesPara nasal sinuses Para nasal Para nasal
sinusessinuses are are empty spaces empty spaces with in the skull with in the skull bones around bones around the nose.the nose.
They open into They open into the nose.the nose.
They are lined They are lined by respiratory by respiratory mucosamucosa
Named as Named as frontal, frontal, maxillary, maxillary, sphenoid and sphenoid and ethemoidethemoid
Nasal cavitiesNasal cavities
Vestibular partVestibular part
Covered by skin Covered by skin Having coarse hairs Having coarse hairs
called vibrissaecalled vibrissae Serve as initial filter to Serve as initial filter to
stop the entry of stop the entry of particulate material into particulate material into the nosethe nose
Sebaceous and sweat Sebaceous and sweat gland help in moistening gland help in moistening and warming the the and warming the the dried airdried air
Respiratory mucosaRespiratory mucosa
Five type of cells Five type of cells present in epithelial present in epithelial lininglining
Ciliated columnar cells, Ciliated columnar cells, goblet cells, APUD cells, goblet cells, APUD cells, basal stem cells and basal stem cells and brush cells with brush cells with microvilli (sensory microvilli (sensory function)function)
Mucous membrane Mucous membrane adherent to underlying adherent to underlying periosteum and periosteum and perichondriumperichondrium
Respiratory Mucus MembraneRespiratory Mucus Membrane
Respiratory part of Respiratory part of nose and Para nasal nose and Para nasal sinuses are Lined by sinuses are Lined by respiratory mucous respiratory mucous membranemembrane
Psudostratified Psudostratified columnar ciliated columnar ciliated epithelium with goblet epithelium with goblet cellscells
Lamina propria Lamina propria containing mucous containing mucous and serous glandsand serous glands
Numerous thin walled Numerous thin walled veins specially over veins specially over the inferior concha the inferior concha
Nasal ConchaeNasal Conchae
Nasal Conchae – spicule of bone Nasal Conchae – spicule of bone covered with Resp Epith w/ a lamina covered with Resp Epith w/ a lamina
propria w/ many veinspropria w/ many veins
Diagram of the Olfactory Diagram of the Olfactory EpitheliumEpithelium
Psudostratified Psudostratified columnar cells with columnar cells with three didifferent three didifferent type of cellstype of cells
L.P containing L.P containing loose CT, BV and loose CT, BV and small serous small serous glands and bundle glands and bundle of axonsof axons
OLFACTORY MUCOSAOLFACTORY MUCOSA
Psudostratified Psudostratified columnar ciliated columnar ciliated epitheliumepithelium
Three type of cellsThree type of cells True bipolar True bipolar
olfactory cellsolfactory cells Sustentacular Sustentacular
supporting cells &supporting cells & Basal stem cellsBasal stem cells
SEM of the surface of the Olfactory SEM of the surface of the Olfactory EpitheliumEpithelium
From each From each Bipolar cells Bipolar cells arise 12 non arise 12 non motile modified motile modified cilia from cilia from olfactory nobe olfactory nobe
From basal end From basal end arise axonearise axone
Pierce basement Pierce basement membranemembrane
Group of axons Group of axons pierce cribriform pierce cribriform plateplate
Olfactory mucosaOlfactory mucosa
Supporting cellsSupporting cells Wider at upper endWider at upper end Long microvilli arising Long microvilli arising
from this surfacefrom this surface Junctional complexes Junctional complexes
present between two present between two cellscells
Serous glands called Serous glands called BOWMANS GLAND BOWMANS GLAND present in L.Ppresent in L.P
please noteplease note
Mucous secretion traps the particulate matterMucous secretion traps the particulate matter Cilia sweep the mucous towards pharynx to swallowCilia sweep the mucous towards pharynx to swallow Numerous veins and mucous help in air Numerous veins and mucous help in air
conditioning (warming and moistening)conditioning (warming and moistening) Olfactory epithelium is yellowish in colour Olfactory epithelium is yellowish in colour Supporting cells have lipofucine pigment , may be Supporting cells have lipofucine pigment , may be
phagocytic in functionphagocytic in function Bowmans gland secretion dissolve the content and Bowmans gland secretion dissolve the content and
help in olfactionhelp in olfaction