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Samenvatting histologie van het urinair stelsel prof. Ferdinande Blok cardiovasculair stelsel, ademhalingsstelsel en urinewegen

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Samenvatting histologie van het urinair stelsel prof. Ferdinande Blok cardiovasculair stelsel, ademhalingsstelsel en urinewegen

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December 14, 2021
Number of pages
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Written in
2021/2022
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Histologie AJ 2021-2022




Histologie van het urinair systeem



1. Inleiding


Nieren:
§ Regulatie van water- en elektrolytenbalans en zuur-base balans
§ Excretie van metabole afvalproducten met overmaat water en elektrolyten in urine
§ Excretie van bioactieve substanties
§ Secretie van renine: regulatie van de arteriële bloeddruk
§ Secretie van erythropoietine: stimulatie van RBC productie
§ Omzetten van de pro-vorm van vit D tot de actieve vorm
§ Gluconeogenese tijdens vasten


Ureters:
§ Transport van urine naar blaas


Blaas
§ Tijdelijke opslag van urine


Urethra
§ Afvoer van urine buiten het lichaam




2. Nieren


Functie:
§ Filtratie
§ Tubulaire secretie
§ Tubulaire reabsorptie



1

, Histologie AJ 2021-2022

De nieren liggen retroperitoneaal (omgeven door perirenaal vet waarin ook bijnieren liggen)
Fibreus nierkapsel


Mediale zijde = hilus: a. renalis, v. renalis, nierbekken of pelvis, lymfevaten en zenuwen
gelegen in de niersinus
§ De niersinus is gevuld met vet dat in continuïteit is met het perirenaal vet)




Ureter à nierbekken à 2-3 calices majores à calices minores




Medulla:
§ Pyramiden
o 8-18
o Basis tegen cortex/corticomedullaire junctie
o Top = papillen à komt uit in calix minor


§ Nierkolommen van Bertin
o = strengen vanuit de cortex
o Scheiden pyramiden van elkaar


§ Lobus = pyramide + cortexweefsel rondom en aan basis


Cortex:
§ Mergstralen van Ferrein
§ Lobulus = cortexgebied dat mergstraal omgeeft




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