Summary
Samenvatting epitheel histo
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dit is uit het boek , slides, notities van patric calders
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H1 histologieEpitheel
Weefsel leer
Weefsel= structuren gevormd door groepering van cellen
= gelijksoortige vorm en funcite
4 primaire weefsels
- Epitheel
- Bind-en steunweefsel ( kraakbeen – been )
- Spierweefsel
- Zenuwweefsel
Vermengd ( verschillende verhoudingen)
1) Epitheel
- Functie : bekleden of bedekken ( huid)
: opname stoffen ( darmwand )
: Afscheiding van stoffen ( klieren)
: Opnemen van prikkels ( neuro – epitheel)
: samentrekken ( myo- epitheel)
- Oorsprong = 3 embryonale kiembladen
: ectoderm ( huid, mond, neus, anus)
: mesoderm ( nier,… )
: entoderm ( ademhalingswegen,
spijsverteringskanaal , klieren , (pacreas…)
- Vormen van epitheelcellen
*vorm & afmeting zeer verschillend hoog cilindrisch tot zeer plat
*veelhoekige vorm
*lange as v/d ker in richting v/d grootste afmeting
*Vorm v/d celkern aanwijzing over de vorm v/d cellen
*Ligging v/d celkern om epitheelsoorten van elkaar te onderscheiden
Classificatie van epitheel cellen
- Bedekken epitheel (1)
- Klier epitheel (2)
, - Bedekken epitheel (1)
1lagig: : plat ( plaveiselepitheel) : lis van henle
: kubische : nierbuisjes
: cilinder: darmkanaal ( vanaf slokdarm)
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