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samenvatting urinair stelsel
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samenvatting van hoofdstuk 18 uit het boek 'anatomie en fysiologie: een inleiding' + aangevuld met notities
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ANATOMIE: HET URINAIRSTELSEL
INLEIDING
Functies urinair stelsel:
‐ Verwijdering van organische afvalstoffen die in ons lichaam gevormd worden
‐ Regulatie van het bloedvolume en de bloeddruk
o Aanpassen volume water dat met urine verloren gaat
o Afgifte EPO (zorgt voor de extra aanmaak van RBC)
o Afgifte van renine
‐ Regulatie van plasmaconcentraties van ionen
o Na+
o K+
o Cl-
o Ca2+ (calcitriol)
‐ Stabilisatie van pH van het bloed
‐ Behoud van waardevolle voedingsstoffen (glucose, aminozuren)
ORGANISATIE VAN HET URINAIR STELSEL
‐ ren; renes (nieren) → productie
urine
‐ Ureters
‐ Vesica urinae urinewegen
‐ Urethra
→ rechter nier ligt lager dan de linker, dit komt omdat de lever ‘duwt’ op de rechter nier waardoor die iets
lager in het abdomen komt te liggen
DE NIEREN
TOPOGRAFIE
‐ De nieren bevinden zicht dorsaal in het abdomen
‐ Retroperitoneaal
o = ze liggen buiten het buikvlies
‐ Rechter nier lager door de lever
,
, VENTRAAL ZICHT: RETROPERITONEAAL
Bloedtoevoer:
4) aorta abdominalis
17) a. renalis
Bloedafvoer:
2) v. cava inferior
16) v. renalis
UITWENDIGE ANATOMIE
INWENDIGE ANATOMIE
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