ANIMAL DIGESTION. Ms.Tanyaratana Dumkua Biology Department, MahidolWittayanusorn School
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1 ANIMAL DIGESTION Ms.Tanyaratana Dumkua Biology Department, MahidolWittayanusorn School
2 What is digestion? Why animals do digest? Where does digestion occur? Digestion is a part of food processing. It is a process of breaking food down into molecules small enough for the body to absorb. The processing occurs in digestive tracts.
3 Archenteron -> Primitive gut
4 Protostomia & Deuterostomia
5 Gastrulation of Mammal
6 Gastrulation of Mammal
7
8 Primitive gut
9
10 No Germ Layers No Mesoderm Created Diploblastic Triploblastic
11
12 ANIMALS No gut Have gut
13 Two Type of Digestive Tracts Starts with extracellularly, but ends with intracellularly. Extracellular digestion
14
15
16
17 Intracellular digestion in Amoeba
18 Intracellular digestion in Sponge
19 Cnidarians: Gastrovascular Cavity
20 Platyhelminthes: Gastrovascular Cavity
21 Nematodes: Complete gut
22 Annelids: Complete gut
23 Arthropods: Complete gut
24 Arthropods: Complete gut
25 Fish: Complete gut
26 Fish: Complete gut
27 Aves: Complete gut
28
29 Aves: Complete gut
30
31
32 Mammal: Complete gut
33
34 Ruminants: Complete gut
35 Ruminants: Complete gut
36 Four Chambers in Ruminant
37 Four Chambers in Ruminant
Nutrition. Autotrophs. plants, some protists & bacteria producers
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