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Summary

Samenvatting - Menselijk Functioneren 1

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hoorcollege en werkcollege Hart samenvatting

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  • April 30, 2024
  • 20
  • 2022/2023
  • Summary
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lOMoARcPSD|17830946




HC Het Cardiovasculair

stelsel Het Hart


Functie hart in het bloedvatenstelsel:
1. Weefsels zijn afhankelijk van de aanvoer van O2 en voedingsstoffen en de afvoer
van afvalstoffen van de omringende (interstitiële) weefsels
2. Uitwisseling via circulerende bloed naar de weefsels
3. Pomp: hart – 10.000*/dag -> 8000 liter/24 uur
4. Hart: dubbele pomp
• Rechts = kleine bloedsomloop – pulmonale circulatie – lage druk – uitwisseling O2
en CO2 in het longweefsel
• Links = grote bloedsomloop – systeemcirculatie – hoge druk – uitwisseling O2 en
CO2, voedingsstoffen en afvalstoffen met de perifere weefsels

Bloedvaten van en naar het hart:
1. Arterie (slagader) = efferent bloedvat -> weg van het hart, links
2. Vene (ader) = afferent bloedvat -> naar het hart toe, rechts
3. Capillairen (haarvaten) = kleinste bloedvaten, waar de uitwisseling van gassen
en voedingsstoffen plaatsvindt

, lOMoARcPSD|17830946




Hart ligt tussen wervelzuil en sternum
(borstbeen). Aan de voorkant meer naar links.
Na 3 minuten is er sprake van irreversibele
hersenschade.
Mediastinum : ruimte in borstkas waar het hart
in ligt exlusief de longen.




Rechterlong is groter dan de linker. Rechts heeft 3 longkwabben links maar 2.

, lOMoARcPSD|17830946

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