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Biologie - hoofdstuk 5 - paragraaf 3 - horen en zien - samenvatting
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Biologie - samenvatting boek: biologie voor jou - havo/vwo - leerjaar 1 - boek 1b hoofdstuk 5 paragraaf 3: Horen en zien
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Paragraaf 3 Horen en zienDe bouw van de oren
Elk oor: gehoorzintuig en evenwichtszintuig
o Gehoorzintuigen: geluiden waarnemen (trillingen van de lucht)
o Oorschelp: vangt trillingen op gehoorgang trommelvlies
wordt in trilling gebracht laat gehoorbeentjes trillen geven
de trillingen door aan venster in slakkenhuis vloeistof in kanalen
van slakkenhuis gaan trillen
o Middelste kanaal: zintuigcellen worden geprikkeld door
trillingen van vloeistof in zintuigcellen ontstaan impulsen
gehoorzenuw geleidt impulsen naar hersenen
o Oorsmeerkliertjes: maken oorsmeer houdt trommelvlies soepel
o Trommelholte: ligt achter trommelvlies. Hierin liggen 3
gehoorbeentjes:
Hamer
Aambeeld
Stijgbeugel: verbonden met venster: dun vlies
o Andere kant van venster: slakkenhuis: 3 kanalen die zijn opgerold
zijn gevuld met vloeistof
o Buis van Eustachius: verbindt trommelholte – keelholte
Is meestal dicht slikken of gapen: buis gaat open lucht
van trommelholte naar keelholte en omgekeerd: luchtdruk
gelijk trommelvlies goed trillen
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