Biology 1: Digestive System

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Ung tae

Cards (24)

  • Digestive System
    The system responsible for the digestion and absorption of food in the body
  • Components of the Digestive System
    • Gastrointestinal Tract / GI Tract
    • Accessory Organs
  • GI Tract

    • Where digestion and absorption take place
    • Continuous chain of organs
    • Lined with smooth muscles whose rhythmic contractions generate waves of movement along the walls known as Peristalsis (The force that propels food down the tract)
  • Digestion

    The process of breaking down food into smaller, simpler components to be absorbed by the body
  • Products of Digestion
    • Glucose (from Carbohydrates)
    • Amino Acids (from Proteins)
    • Fatty Acids + Glycerol (from Fats)
  • Peristalsis
    The rhythmic contractions of the smooth muscles in the GI tract that propel food down the tract
  • Segmentation Contractions

    Contractions of the circular muscles in the intestinal walls that move chime in both directions, allowing better mixing with digestive juices and longer continous time with the intestinal walls
  • Bacterial fermentation in the colon produces various vitamins that are absorbed through the walls of the colon
  • Salivary Glands
    Paratoid, Submandibular, Sublingual
  • Throat
    Pharynx, Vocal Cords, Esophagus
  • Small intestine
    Duodenum, Jejunum, Ileum
  • Mouth
    Palate, Uvula, Teeth, Tounge
  • Large Intestine
    • Transverse Colon
    • Ascending Colon
    • Cecum
    • Descending Colon
    • Sigmoid Colon
    • Rectum
  • Middle
    Liver
    Gallbladder
    Common Bile Duct
  • Stomach Part
    Pancreatic Duct
    Stomach
    Pancreas
  • Saliva contains
    Amylase
  • breaks down starch into maltose and dextrin
    Amylase
  • Stomach produces?
    Gastric juice containing pepsin and Hydrochloric Acids
  • A semi liquid mass of partially digested food
    Chyme
  • Duodenum receives
    Bile, Pancreatic Juice, Intestinal Enzymes
  • Intestinal enzymes
    Peptidases, Sucrose, Lactase, Maltase
  • Bile
    Produced in the liver and stored in the gallbladder
  • Emulsifies Fats
    Bile
  • Pancreatic Juice
    Proteases Lipases and amylase