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Samenvatting Anatomie en fysiologie van het bloed

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Anatomie en fysiologie van het bloed

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ANATOMIE & FYSIOLOGIE VH
BLOED
DEEL 1 - SAMENSTELLING
INLEIDING

FUNCTIES
Transport vn opgeloste gassen gebonden aan RBC, hormonen, voedings- & afvalstoffen binnen
bloedvatenstelsel

Stabilisering vn pH & ionensamenstelling vd interstitiële vloeistof (ECV) & hele lichaam dankzij buffers
Beperking vn vloeistofverlies bij verwonding door bloedstolling
Verdediging tegen gifstoffen & ziektekiemen mbv leukocyten (WBC) & antistoffen
Stabilisering vd lichaamsT


SAMENSTELLING VAN HET BLOED
= vloeibaar bindweefsel

Cellen: - rode bloedcellen: O2 transport
- witte bloedcellen: afweer
- bloedplaatjes: bloedstolling

Vezels: eiwitten komen onder normale omstandigheden nt voor als vezels
 spelen wel rol in bloedstolling!

Grondsubstantie: vloeibare waterige matrix
= bloedplasma
 lymfe/interstitieel vocht ontstaat door filtratie bloedplasma door wand haarvaten


Hematocriet = % RBC in vol bloed




SOORTEN BLOEDAFNAMES
Veneuze punctie: vanuit oppervlakkige ader bv. vena mediana cubiti
 makkelijk te vinden
 dunnere wand dan slagader
 lagere BD

Perifere capillairen: id vingertop of hielprik bij kindjes
Arteriële punctie: vanuit slagader bv. arteria radialis (pols) of a. brachialis (elleboog)

, DE 3 VOCHTCOMPARTIMENTEN VAN HET LICHAAM
Plasmacompartiment: ± 4l (1/12)
Intercellulair vocht: ± 12l (1/4)
Intracellulair vocht: ± 32l (2/3)

Totaal lichaamsvocht = ong 60% vh LG
 bij vrouwen 55%
 bv. 48l bij man vn 80kg

Vochtbalans: - input  voedsel + drank: 2.8l
 metabool water: 0.2l

- output  urine: 1.6l
 zweet/huidverdamping: 0.6l
 uitademingslucht: 0.6l
 stoelgang: 0.2l

Bijdrage vn plasma tt lichaam: 5% (3l)

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