Digestive System

starts the process of breaking down food (ingest) 2 ways: mechanical: teeth and tongue chemical: enzymes (saliva) swallows food

muscular tube connecting mouth to stomach smooth muscle tissue, contracts (rhythmic muscle-PERISTALSIS) to slowly move the food along

holds food and churns it to continue the process of digestion (mixes with enzymes and acids) richly supplied with nerves that signals when full or hungry

6m long where most digestion happens Goblet cells release mucus, and nutrients diffuses through the wall and enters bloodstream

1.5m long lining absorbs water from the indigestible food remaining solid matter excreted from anus

produces a fluid called bile, which helps the breakdown of fats in our food

produces many digestive enzymes that secretes into small intestine. enzymes break down fats, proteins and carbohydrates produces insulin that helps regulate the concentration of glucose in the blood

stores and concentrates bile, secreted into small intestine

temporarily stores waste (feces)

lining of the upper anus detects rectal contents indicates whether contents are liquid, solids, gas egestion

• ingestion • digestion • absorption • egestion

• digestive tract 2. accessory organs