6 functions of digestive system
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Absorption
Absorbs nutrients out of alimentary tract
Digestion
Breakdown of food into forms that are transportable and absorbable
Amylase
Digests carbohydrates
Lipase
Digests fats
Protease
Digests proteins
Secretion
Lubricates, liquefies to digests food
Propulsion
Mechanical movement of food through the alimentary canal
2 ways of digestion
Mechanical= broken into smaller pieces Chemical= enzymes changing foods into simpler molecules
Ingestion
Selective intake of food
Elimination
Undigested residue and waste removed from body