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samenstelling bloed

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samenstelling van bloed

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  • November 9, 2021
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  • 2021/2022
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Samenstelling van bloed


7,5% van het lichaamsgewicht is bloed.

Je hebt bloedcellen en bloedplasma.

Serum = plasma zonder stollingseiwitten
Hematocriet = volume van bloed ingenomen door rode bloedcellen


Bloedplasma bestaat uit:

 Water
- afname door: nieren, transpiratie, uitademing en ontlasting
Zouten
- veelvoorkomend: kalium, natrium, chloor, calcium, magnesium, waterstofcarbonaat.
- belangrijk omdat: osmotische waarde behouden
- bloedvolume en bloeddruk
- zuurgraad (zoutgraad) reguleren
 Plasma eiwitten
- albumine, 50% rol osmotische waarde
- globuline, transportfunctie
 Bloedgassen
- zuurstof, koolstofdioxide, stikstof

Bloedcellen (erytrocyten):
 Aanmaak in rode beenmerg
 99% van totaal
 Hemoglobine = eiwit waar o2 zich bind
 Leeft 120 dagen
 Wordt afgebroken in de lever
 Afvalproduct = bilirubine, gaat via gal uit lichaam

Witte bloedplaatjes (leukocyten)
 Afweer, immuniteit
 Granulocyten (opeten bacterieeen)
 Monocyten (opruimen bacterieen en cellen)
 Lymfocyten (immuniteit, nemen toe bij infectie)

Bloedplaatjes (trombocyten)
-rol in stolling
-aggregatie - aan elkaar plakken trombocyten

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