Pyelo-calycieel systeem =
nierbekken en nierkelken
systeem
vesico-ureterale reflux = urine
terugvloei
investigatie naar congenitale afwijkingen bv. dubbele ureter, gevaar: blijven staan van urine
Schema 2) nier: detail / merg schors / nefron
49
, Delen van de nier:
- Schors (cortex)
o Gespikkeld uitzicht
= gekronkelde delen van de nefronen
- Merg (medulla) = mergpiramiden
o Gestreept uitzicht = mergstralen
= rechte delen van de nefronen
= Lissen van Henle en de ducti colligentes
o Top van piramide = papil
Schema 3) delen van nefron
In nefron wordt urine gemaakt.
Bevloeiïng van nier: voor glomerulus:
Zuurtsofrijk bloed / zuurstofarm bloed
Aorta arteria renalis interlobaire arteriën boogvormige arteriën aan basis van
piramiden vas afferens (arteriool) (aanvoerend naar glomerulus) glomerulus (capillair
netwerk tussen twee slagaders) verder hieronder (na glomerulus)
Bevloeiïng van nier: na glomerulus
vas efferens (weg van glomerulus) (arteriool) capillair netwerk rond de lissen van
Henle interlob(ul)aire venen vena renalis vena cava inferior
De nieren: fysiologie
Overzicht:
A. Urinevorming: diurese
B. Regulatie erytrocytenproductie
C. Bloeddrukregulatie
D. Bloedzuurtegraadregulatie
A.Urinevorming
Stappen in de diurese:
1. Ultrafiltratie: glomerulus
2. Reabsoptie: TC 1 & 2 (tubulus contortus) + lis van Henle + verzamelbuis
3. Excretie: TC 2
50
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