Animal Nutrition I (Ch. 41)
Keywords
Some of the best known and fascinating adaptations of animals involve their feeding and digestion
Examples:
Python
Starfish
Chiasmodon niger
Cryptopsaras couesi
Eurypharynx pelecanoides
PPT Slide
Categories
Today weíll focus on heterotrophs: Digestion
Why is digestion necessary?
Small molecules such as amino acids can
Even if macromolecules are taken inÖ
They cannot be readily incorporated
Unless broken down first
This lecture will focus on how animals break down food
I. Intracellular digestion
Intracellular digestion without vacuoles
Intracellular digestion with vacuoles
Digestion in Paramecium
Intracellular digestion vs. Extracellular digestion
Extracellular digestion
Gastrovascular cavity: Hydra
Gastrovascular cavity vs. Alimentary Canal
Alimentary canal: a simple view
Basic parts of alimentary canal
Alimentary canal: mammalian
Mouth
Stomach
Digestive mechanisms in stomach
Email: rlee@mail.wsu.edu
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