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hoorcollege aantekeningen Medische biologie
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Aantekeningen over de circulatie in het lichaam
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Hoorcollege 4.3: CirculatieCirculatie
Uitwisseling van stoffen
Handhaven van de homeostase
Bloedsomloop
Kleine bloedsomloop: rechterhartkamer longslagader longen zuurstofrijke bloed
longader linkerhartkamer
Grote bloedsomloop: linkerhartkamer aorta organen
Bloedvaten
Arteriën: slagaders
Arteriolen: kleine slagaders
Capillairen: haarvaten, dunne wanden zodat stoffen gemakkelijk erdoor heen kunnen
Venulen: kleine aders
Venen: aders
Bouw van bloedvaten
Alle bloedvaten behalve capillairen:
1. Tunica interna/intima
2. Tunica media
3. Tunica externa/adventitia
Dikker bij arterie door de druk die erdoor
heen loopt
Elasticiteit arteriën
Bloeddruk = kracht die bloed uitoefent op de
bloedvatwand
Druk wordt steeds lager hoe verder weg
, Venen
Terugstroom door:
- Kleppen
- Spierpomp
- Hartpomp
- Adempomp
- Arteriële pomp
Arteriën
Door vasoconstrictie en vasodilatatie kan worden gereguleerd hoeveel bloed er stroomt
Het hart
Cor/cardia
Kamers – ventrikels
Boezems – atria
Bovenste holle ader – vena cava superior
Onderste holle ader – vena cava inferior
Longslagaders – arteria pulmonales
Longader – venae pulmonales
Hoofdslagader – aorta
Bloedstroom door het hart
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