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Samenvatting hoofdstuk 22

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Volledige samenvatting van hoofdstuk 22, Chordata, Classis Mammalia

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  • November 1, 2023
  • 9
  • 2022/2023
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HOOFDSTUK 22: Chordata - Classis Mammalia



1. Inleiding en diagnose

- Homoioterm (constante lichaamstemperatuur)
- Endoterm
- Lichaam BEDEKT MET  haren, huid met talrijke klieren
- 2 achterhoofdsknobbels
- 7 halswervels
- Tanden op boven- en onderkaak
- Onderkaak  SCHARNIERT MET  schedel
- 3 gehoorbeentjes
- Beweegbare oogleden
- Vlezige oorschelpen
- 2 paar poten
- 4-kamerig hart
- Ademhaling  DOOR  longen, luchtpijp met stemorgaan (larynx)
- Gespierd middenrif
- Nieren, ureters en urineblaas
- GOED ONTWIKKELDE  hersenen
- 12 paar hersenzenuwen
- Gescheiden geslachten
- Inwendige bevruchting  MET  penis
- Embryonale ontwikkeling  IN uterus  MET placenta
- Jong  GEVOED  melk



2. Verschillen met Reptilia

, 3. Bouwplan en bijzondere kenmerken



3.1. Haar

- Kleur  BEPAALT DOOR  melanine
- Vorm  BEPAALT DOOR  keratine
- RECHTE GEZET WORDEN  spiertjes

BESTAAT UIT:

- Haarschacht
GEVOED  bindweefselpalpi
- Haarwortel

VERSCHILLENDE LAGEN:

a. Merg BESTAAT UIT  keratine
b. Cortex  hard keratine
c. Geschubde cuticula




3.2. Klieren

3.2.1. Talgklieren

- MONDEN UIT IN haarfollikel
- Waterafstotende talg
- KOMT OOK VOOR OP  onbehaarde lichaamsdelen



3.2.2. Zweetklieren

- KOMT VOOR  ganse lichaam
- FUNCTIE  thermoregulatie
- LIBEREREEERT VOORAL  water en NaCl



3.2.3. Apocriene klieren

- Tubulaire instulpingen
- SPECIFIEKE PLAATS  bij haarfollikels
- BEVATTEN  feromonen
- GEKENDE ALS  stinkklieren (scheiden een reukloos sekreet af)

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