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Samenvatting Bijspijkeren Biologie

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Alle informatie van het vak Bijspijkeren biologie van Basil

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Uploaded on
November 2, 2019
Number of pages
12
Written in
2019/2020
Type
Summary

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BIOLOGIE


Huid

CUTIS HUID FUNCTIE


Functies:
1. Bescherming:
Mechanisch, chemisch, biologisch (bacteriën), straling UV en uitdroging.
2. Uitscheiding:
Water verdamping --> zout.
3. Warmteregulatie:
Vasoconstrictie of vasodilitatie & transpiratie
4. Synthese van vitamine D:
Ergosterol stof in de huid cellen o.n.v. UV straling --> omgezet in Vit. D
5. Sensorische functie:
Veel sensoren, druk, pijn, tast, en temperatuur.

Twee lagen:
1. Epidermis (opperhuid) --> GEEN bloedvaten
2. Dermis (lederhuid) --> WEL bloedvaten

LET OP: De Subcutis (onderhuidse bindweefsel) hoort strikt genomen niet
tot de huid




De subcutis:
• Is onderhuidse bindweefsel hoort strikt
genomen niet tot de huis, dus de huid bestaat
uit twee lagen (epidermis en dermis), niet drie
lagen.

, 1. Epidermis (Opperhuid)
- Is niet door bloed en en er zijn geen lymfvaten
- Wel fijne vertakkingen vrij zenuwuiteinden.

- Bij beschadiging van cellen:
- Vrij veel stoffen (histamine) —> Pijnsensatie

- Zijn de cellen intact:
- Geringe hoeveelheden vrij stoffen —> Jeuk

2. Dermis (Lederhuid)
Hier bevinden zich: bloedvaten, zenuwen, tastzintuigjes.
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Explanatory notes would be appreciated

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5 year ago

There is also a date of publication on it;)

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Thank you very much! Success with learning

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