Haseeb Ullah

Introduction •       Our digestive system is a network of organs that help us digest and absorb nutrition from your food. •       It includes your gastrointestinal (GI) tract and your biliary system. •       Our GI tract is a series of hollow organs that are all connected to each other,      leading from your mouth to your anus. •       Your biliary system is a network of three organs that deliver bile and enzymes through to your GI tract your bile ducts. Function of GIT         •       Ingestion •       Mechanical Processing •       Digestion •       Secretion •       Absorption •       Excretion v   Ingestion o    Occurs when materials enter to digestive tract via mouth. v   Mechanical Processing o    Crushing and shearing makes material easier to propel along digestive tract. v   Digestion o    A chemical brake down of food into small fragments for absorption by digestive                epithelium. v   Secretion o    The release of water, acid