Summary
Samenvatting De huid
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duidelijke samenvatting, met dit hoofdstuk en de andere hoofdstukken ben ik op het examen anatomie & fysiologie deel 2 goed geslaagd
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De huidFuncties:
- Bescherming
- Warmteregulatie
- Synthese van vit D
- Zintuiglijke waarneming
1.Epidermis
= meerlagig, verhoornd dekweefsel
Lagen:
- Stratum germinativum = kiemlaag
o Stratum basale
- Hoornlaag
o Stratum corneum
Huidkanker: invloed van UV (A en B): cumultatief effect (UV B oorzaak verbranding, kankerverwekkend)
Al dan niet meer pigmentcellen = melanocyten
Epidermis heeft geen eigen bevloeiing, bezenuwing en lymfeafvoer.
Huidaanhangsels:
- Haren
o Groeit vanuit uitstulping van epidermis in derma
Gebruik van cystostatica: haaruitval = alopecia
Haarcyclus: groei – overgang – rust (uitval)
o Haren en zwangerschap
Oestrogeen haarcyclus wijzigt
Groeifase + 3 maanden rust
Niet zwangere: 20% van haren in rust
Zwangere: 10% in groei
Postpartum: 30% in rust
haar groeit meer en dikkere haren
o Haren en chemotherapie
Door cytostatica wil men de groei van kankercellen afremmen, hierdoor ook snel-
delende cellen in lichaam getroffen (slijmvlies M-D stelsel, beenmerg), maar ook
cellen van haarfollikels, gevolg: alopecia (haarverlies)
- Talgklieren
o Talg = sebum = huidsmeer
- Nagels
o Groeit vanuit omslagplooi van huid: vanuit basale cellen van nagelwortel of matrix
o Nagelbed bestaat uit stratum germinativum
o Subungaal hematoom = bloedophoping onder nagel (teen tussen deur)
o Onychomycose = schimmelinfectie
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