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THE DIGESTIVE SYSTEM (FUNCTIONS (Absorption, Digestion, Ingestion,…

- - - - in mouth
      - in duodenum
    - - Starch
  - - - in duodenum
    - - Fat
  - - - in stomach
      - in duodenum
    - - Protein
- - - - Churning (in stomach)
      - Chewing (in mouth)
  - - - Gastric acid help breakdown protein (in stomach)
      - Food mixes with saliva and breakdown carbohydrates (in mouth)
- - - - Teeth and the tongue mechanically digest food
      - Salivary glands produce saliva, amylase begin to breakdown carbohydrates
      - The food is shaped into a bolus and swallowed into the esophagus
    - - The bolus is pushed through the esophagus by peristalsis (wave of muscle contractions)
    - - Performs a chemical breakdown due to enzymes and hydrochloric acid
      - The stomach wall churn the food to mix with Gastric acid
    - - Chemical digestion of proteins, carbohydrates, nucleic acids, and fats occurs in duodenum
      - The liver, gallbladder, and pancreas release digestive fluids into the duodenum
      - Nutrients are absorbed from the jejunum and ileum
    - - Water, minerals, and vitamins are absorbed
      - The semisolid waste is pushed into the rectum.
      - Muscles in the rectum control the release of the waste, called feces, through the anus