Science

• Mouth - where mechanical and chemical digestion begin
• Esophagus - pushes the food from the throat to the stomach through the process of peristalsis
• Stomach

  • produces gastric juices mucus and hydrochloric acid
  • churned food and mixed it with gastric juices
• Small intestine - produces juices that aids digestion

  
• Large intestine

  • undigested food will go here
  • most of the water from undigested food is absorbed
• Rectum - stores feces
• Anus - Opening through which solid waste material leaves the body
• Liver - produces bile, greenish- yellow liquid, which helps to break down fat
• Gallbladder - stores bile
• Pancreas - secretes enzymes for digesting starch and protein
• Stages of digestive process

  1. Ingestion
  2. Digestion
  3. Absorption/Assimilation
  4. Elimination
• Ingestion

  • The process by which food is taken into the alimentary canal
  • Includes the processes that take place while the food is in the mouth
• Digestion - The process by which invested (food) material is broken down into a form that can then be absorbed and assimilated into the tissues of the body.
• Digestion

  • Digestion includes two types of processes
  • Mechanical (e.g. chewing, grinding, churning,mixing), and
  • Chemical (e.g action of digestive enzymes,bile, acids, etc.).
• Absorption/Assimilation

  • Absorption is the uptake of fluids or other substances by the tissue of the body
  • Assimilation is the process by which components / chemical's from food are taken into the cells of the body