Samenvatting Cheat Sheet Spijsverteringsstelsel | Vergelijkende Biologie | KU Leuven | 2026/27

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Samenvatting Cheat Sheet Spijsverteringsstelsel | Vergelijkende Biologie | KU Leuven | 2026/27

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Dit cheat sheet behandelt het spijsverteringsstelsel uit het vak Vergelijkende Biologie aan KU Leuven. De stof omvat basisbegrippen zoals voedingsstrategieën, de evolutie van spijsverteringsstelsels (van intracellulaire tot extracellulaire vertering), het menselijk digestietrakt, histologie van de darmwand, en hormonale regulatie met focus op leptine en neuro-endocriene controle. Dit document is ideaal voor examenvoorbereiding omdat het de kernconcepten bondig samengevat en gemakkelijk aan te leren is.

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CHEAT SHEET BIOLOGIE -
SPIJSVERTERINGSSTELSEL
1. Basisbegrippen
Voedingsstrategieën
 Autotroof: maakt zelf organische moleculen (planten).
 Heterotroof: neemt organische moleculen op via voeding (dieren).

Voedseltypes
 Herbivoren = planteneters
 Carnivoren = vleeseters
 Omnivoren = alleseters

Stappen van spijsvertering
1. Ingestie (voedselopname)
2. Fragmentatie (kauwen, vermalen)
3. Chemische digestie (enzymatische afbraak)
4. Absorptie
5. Defecatie

2. Evolutie van spijsverteringsstelsels
Intracellulaire vertering
 Eencelligen en sponzen
 Via endocytose:
o fagocytose
o pinocytose

Extracellulaire vertering
 Multicellulaire dieren
 Vertering gebeurt in een spijsverteringsholte

Onvolledig spijsverteringsstelsel
 Mond = anus
 Eén opening
 Gastrovasculaire holte
 Voorbeelden:
o Cnidaria
o Platwormen

Volledig spijsverteringsstelsel
 Mond ≠ anus
 Richtingsverkeer
 Mogelijkheid tot specialisatie
 Voorbeelden:
o Nematoden, vertebraten, …

, 3. Overzicht menselijk spijsverteringsstelsel
Volgorde:
Mond → farynx → slokdarm → maag → duodenum → jejunum → ileum →
caecum → colon → rectum → anus
Geassocieerde organen:
 Pancreas
 Lever
 Galblaas

4. Histologie van de darmwand
Van binnen naar buiten:
1. Lumen
2. Mucosa
3. Submucosa
4. Circulaire spierlaag
5. Longitudinale spierlaag
6. Bindweefsellaag (serosa)
Belangrijk
Samenwerking van circulaire en longitudinale spieren veroorzaakt:
Peristaltiek = voortstuwen van voedsel door gecoördineerde
spiercontracties.

5. Mond en keelholte
Functie
Mechanische vertering
 Tanden
 Tong

Speeksel
Bevat:
 Water
 Mucine
 Buffer
 Amylase
 Lysozyme (antibacterieel)

Amylase
 Zetmeel → maltose
 Eerste vertering van koolhydraten

Slikreflex
Functies:
Huig
 Sluit neusholte af

Epiglottis
 Sluit luchtweg af

Gevolg

Document information

Study: Biomedische Wetenschappen
Uploaded on: August 26, 2026
Number of pages: 7
Written in: 2026/2027
Type: Summary

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Cheat Sheets Vergelijkende Biologie | KU Leuven | 2026/27

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spijsverteringsstelsel
vergelijkende biologie
digestie
voedingsstrategieën
evolutie
leptine
hormonale regulatie
biomedische wetenschappen
examenvoorbereiding
ku leuven

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