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8/16/2019 Lp Mg Glande Salivare Majore Esofag Stomac 2016
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GLANDELE SALIVARE MAJORE
ESOFAGSTOMAC
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CAPSULA: ţes. conj. densSTROMA: - septe conjunctivo-vasculare,
- reţea de fibre de reticulină şi capilarePARENCHIMUL: glande tubulo-acinoase compuse
•Porţiunea sere!oare: ainii sere!ori : seroşi, mucoşi şi micşti•Porţiunea e"re!oare: ana#e#e e"re!oare
– In!ra#o$u#are: ducte intercalare Boll, canale striatePfluger
– In!er#o$u#are – In!er#o$are – Cana#u# %rini%a#
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Acinul seros
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Acinul mucos
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Acinul mixt
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tructura parenc!imului glandelor salivare
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"uct intercalar
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#anal striat
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"ucte striate
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#anal interlobular
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#anal interlobar
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#anal excretor principal
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$landa parotidă
%&
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$landa parotidă
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$l b dib l ă
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$l. submandibulară
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$landa submandibulară
'(
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Gl d bli lă
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Glanda sublinguală
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$landa sublinguală
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ESOFAGUL
– MUCOASA
– SU&MUCOASA – MUSCULARA – ADVENTI'IA
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ecţiune transversalăecţiune transversală:: lumenul esofagului estelumenul esofagului este stelat stelat -- pliuri pliuri
longitudinale ale mucoasei longitudinale ale mucoasei -- dispar ladispar latrecerea bolului alimentar trecerea bolului alimentar
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() MUCOASA• E%i!e#iu# *e su%ra+aţ,:
epiteliu pavimentos stratificatnekeratinizat
• Corion #a.ina %ro%ria/ – Ţesut conjunctiv lax
– Foliculi limfoizi
– Glande cardiale• )ocali*are: porţiunile iniţiale
şi terminale• ecreţie de mucus neutru
• Musu#ara .uoasei - fibre musculare netede
dispuse : - iniţial numai longitudinal
- apoi pe două straturi: • intern circular
• extern longitudinal
- se +ngroaşă progresiv spre cardie
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0 SU&MUCOASA
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0) SU&MUCOASA
• esut conjunctiv mai dens
• ase sanguine şi limfatice• ervi : plexul nervos Meissner • esut limfoid difu* sau nodular
• Glande esofagiene propriu-zise
– $l. tubulo-acinoase compusede tip mucos – /ucus slab acid – "uctul excretor traversea*ă
mucoasa - se desc!ide +nlumenul esofagului
Elasticitatea submucoasei permitedisparitia pliurilor in timpuldeglutitiei.
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1 MUSCULARA
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1) MUSCULARA • ' straturi de fibre musculare: intern - circular
extern- longitudinal 0ntre straturile de fibre musculare -
plexul mienteric Auerbac!
• 1/3 superioară - fibremusculare striate• 1/3 mijlocie - amestec de fibre
musculare striate şi netede• 1/3 inferioară - fibre
musculare netede
– 1ntern: circular – 2xtern: longitudinal
2 ADVENTI'IA
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2) ADVENTI'IA
• Ţesut conjunctiv lax
• Vase sanguine şi nervi
• Paniculi de celule adipoase
STOMACUL
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STOMACUL• Or3an cavitar musculo -
glandular Anatomic:
• Regiune cardială• Regiune fundică
• Regiune pilorică
3istologic:• 2 !unii:
– ucoasă – !ubmucoasă – usculară – !eroasă peritoneală
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() TUNICA MUCOAS4
• "piteliu de suprafa#ă
• "piteliu glandular • $orion• usculara mucoasei
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• EPITELIUL DE SUPRAFA'4:simplu cilindric monomorf
• MO:- celule +nalte, cilindrice,
dispuse pe un singur r4nd
- nucleul ovoid, situat ba*al5 n !E citoplasma apical" #
aspect spumos, vacuolar
ecretă mucus alcalin
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-gl.tubulare simple sauramificate,situate in
corion
6ormate din:
– Is!.
– G5!
– Cor%u# 3#an*ei
G%&'("%" )*'(+$"
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CorpIstm
Gât
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+stmul : - celule 7 epiteliul de suprafaţă- celule de re*ervă - rol +n regenerare
G,tul coletul.: &. $"%*%" *$0 - "2+$" &*+%+&R".4
$ cel cubice8 neregulate, mici - con inț granule de mucus acid
-secreta si enzime ptdipeptide
5. $"%*%" (" R"6"R789nediferenţiate sau celulele stemlocali*are: - g4tul glandei
- istm
C # # * i
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• Cor%u# 3#an*ei:a. #elule principaleb. #elule parietale
c. #elule enteroendocrine
a) #2);)2)2 <=1#1<A)29>1/?$22,
A"2)?/?=62, @A>?61)2
- /ai numeroase profund- ecretăcomponenta enzimatic" asucului gastric
MO:
• celule piramidale sau cilindrice• delimitea*ă lumenul glandei• limitele celulare mai şterse• nucleul: eucrom, nucleolat
• citoplasma: +n 32 granulară, ba*ofilă
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b. #2);)2)2 <A=12A)2 9A#1"?61)2, "2)?/?=62
• umeroase superficial• 6ormă piramidală• u ajung +n lumen-
canalicul intercelular
• ecretă: 3#l, factorulintrinsec #astle
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CELULELE ENTEROENDOCRINE APUD SED/
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) CELULELE ENTEROENDOCRINE APUD sau SED/
– ituate printre celulele epiteliale ale
mucoasei gastrice şi intestinale – ecretă %ormoni peptidici &i aminebiogene
– !E# nu se eviden'iaz" (ecesit" impregn"ri argentice
– unt situate pe m.b., nu ajung n lumen – 0n citoplasmă: granule delimitate de
membrane – %ormoni
– ipuri: argentafine: conţin granule ce reduc direct
Ag?B
argirofile: se impregnea*ă cu Ag ?Bnumaidupă o prealabilă tratare cu substanţereducătoare
enterocromafine: se colorea*ă cu bicromatde potasiu
CORIONUL MUCOASEIGASTRICE
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GASTRICE• conţine glandele gastrice• este redus, dispus interglandular
• #esut conjunctiv lax cu : fibre : colagen şi reticulină celule: fibroblaste, /f, lf,
plasmocite, mastocite, </,mici foliculi limfoi*i, rare fibremusc netede
MUSCULARA MUCOASEI
• fibre musculare netede• dispuse +n general +n ' straturi: intern circularextern longitudinal
0) TUNICA SU&MUCOAS4
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0) TUNICA SU&MUCOAS4 • 'esut conjunctiv mai dens• vase sanguine şi limfatice• plexul nervos eissner
1) TUNICA MUSCULAR4 • f. musc. netede dispuse +n 3 straturi • oblic intern - e bine definit numai la
cardie • mijlociu circular – mai pronunţat +n reg pilorului, unde formea*ă sfincterul piloric
• extern longitudinal mai evident +n
regiunea corpului stomacului
• 0ntre stratul mijlociu circular şi externlongitudinal se află plexul mienteric
&uerbac9
• 2 SEROASA PERITONEAL4
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2) SEROASA PERITONEAL4 tunica externă a stomacului
6ormată dintr-un :• mezoteliu 9epiteliu simplu pavimentos• 'esut conjunctiv subseros
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Mucoasa
mm
Submucoasa
Musculara ext.
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