Digestion in the Stomach by yurtgc548


									    Digestion in the Stomach
• Food, once it is swallowed, may remain in
  the stomach for up to 4 hours.
• Embedded in the folds of the stomach wall
  are glands that secrete HCl, pepsin, and
• HCl activates pepsin (enzyme), which
  breaks down proteins.
• Carbohydrates and fats continue to be
  mechanically broken down by muscular
  contractions in the stomach, but are not
  acted upon chemically.
• Mucus, secreted by special cells in the
  stomach, help protect it from gastric
  juices (combination of HCl and pepsin).
• If the mucus levels become low, the
  gastric juices begin to digest the stomach
  wall, which leads to an ulcer.
• Eventually, the stomach contents turn into
  a thick, uniform liquid called chyme.

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