Digestive System

• Digestive System

  • Made of gastrointestinal tract (GI) - and the liver, pancreas, and gallbladder
• Parts of the digestive system

  • Mouth
  • Esophagus
  • Liver
  • Gallbladder
  • Stomach
  • Pancreas
  • Large intestine
  • Small intestine
  • Anus
• Why is digestive system important?

  • Breaks down nutrients into smaller parts for our body to absorb and use for energy, growth, and cell repair
• Digestive Process

  • Mouth - Chewing
  • Esophagus - Peristalsis
  • Stomach - Upper and lower muscle
  • Pancreas - None
• Digestive Process:

  • Liver - None
  • Small Intestine - Peristalsis
  • Large Intestine - Peristalsis
• what happens to the food digested?

  The small intestine absorbs most of the nutrients in your food, and your circulatory system passes them on to other parts of your body to store or use.
• Peristalsis is a type of involuntary muscle movement that occurs in your digestive system
• What does peristalsis do for the body?


  Peristalsis makes digestion possible. It’s what moves food and fluids through each stage of the digestive process. Without peristalsis, we could neither eat nor poop
• How digestive system breaks down food into smaller parts ?

  • your digestive organs break the food into smaller parts using:
  • motion, such as chewing, squeezing, and mixing
  • digestive juices, such as stomach acid, bile, and enzymes
• Mouth

  • The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food
• Esophagus

  • After you swallow, peristalsis pushes the food down your esophagus into your stomach
• Stomach

  Glands in your stomach lining make stomach acid and enzymes that break down food. Muscles of your stomach mix the food with these digestive juices.
• Pancreas

  • The pancreas delivers the digestive juice to the small intestine through small tubes called ducts.
• Liver

  • Your liver makes a digestive juice called bile that helps digest fats and some vitamins. Bile ducts carry bile from your liver to your gallbladder for storage, or to the small intestine for use
• Gallbladder

  • Your gallbladder stores bile between meals. When you eat, your gallbladder squeezes bile through the bile ducts into your small intestine.
• Small intestine

  • Your small intestine makes digestive juice, which mixes with bile and pancreatic juice to complete the breakdown of proteins, carbohydrates, and fats
• Rectum

  • The rectum is the last section of the large intestine, and it connects the colon to the anus.
• Anus

  • The anus is the last part of the digestive tract. The waste from digestion (poop) leaves the body through the anus.
• How body controls this process:

  Your hormones and nerves work together to help control the digestive process. Signals flow within your GI tract and back and forth from your GI tract to your brain.
• Gastroesophageal reflux disease (GERD) occurs when stomach acid repeatedly flows back into the tube connecting your mouth and stomach (esophagus).
• Lactose intolerance occurs in people who lack the enzyme they need to break down lactose, the sugar in milk. It causes digestive distress when you eat dairy products.
• Irritable bowel syndrome (IBS) causes uncomfortable abdominal symptoms, including constipation, diarrhea, gas and bloating.