6 functions of digestive system

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