Digestive System

• Digestive System - A bodily system concerned with the ingestion, digestion, absorption and the discharge of residual waste in our body.
• DIGESTION - Breakdown of organic compounds into their simple forms
• Types of Digestion - Mechanical digestion - Chemical digestion
• gastric juice - dilute solution of hydrochloric acid and pepsin
• Carbohydrates - amylase

  Protein - enzyme

  Lipids - lipase
• PROCESSES OF DIGESTION

  • Ingestion
  • Digestion
  • Absorption
  • Assimilation
  • Egestion
• INGESTION - The first process that happens in the digestive system. taking in food or any substance into the body through the mouth
• DIGESTION - the teeth cut, crush, and break it apart into tiny pieces
• bolus - saliva secreted by the salivary glands forming into a moist ball
• salivary amylase - enzyme that breaks down starch into smaller carbohydrate or other biomolecules.
• ABSORPTION - It occurs mostly in the small intestine where several digestive juices, pancreatic juice, and bile aid in the chemical digestion of food.
• ASSIMILATION - It is the movement of digested food nutrients into the blood vessels of the small intestine through diffusion and use of nutrients into the body cells through the microvilli. Reabsorption of nutrients are present in this process
• EGESTION - The last process that occurs in the digestive system. It is the release of undigested food collected in the rectum
• feces - release of undigested food collected in the rectum
• PARTS OF THE DIGESTIVE SYSTEM

  • MOUTH
  • ESOPHAGUS
  • STOMACH
  • SMALL AND LARGE INTESTINE
  • PANCREAS
  • LIVER
  • GALLBLADDER
  • RECTUM
  • ANUS
• Amylase - Saliva contains this enzyme that breaks down some starches and carbohydrates
• MOUTH - Chewing breaks the food into pieces while saliva mixes with food to begin the process of chemical digestion.
• ESOPHAGUS - A passageway from the mouth to the stomach.
• peristalsis - Muscular contractions
• STOMACH - Receives food from the esophagus and holds food until digestive juices
• CHYME - creamy mixture of food and digestive juices.
• SMALL INTESTINE - It is where most absorption takes place. It is a 22-foot-long muscular tube
• pancreas - secretes digestive enzymes into the small intestine that help break down protein, fats, and carbohydrates.
• pancreas is also critical in the production of insulin and glucagon, which regulate glucose levels in the blood.
• LIVER - to process the nutrients absorbed from the small intestine.
• GALLBLADDER - A pear-shaped, hollow structure located under the liver
• LARGE INTESTINE - An organ that is responsible for processing waste.
• RECTUM - A storage area for feces. It is an 8-inch chamber that connects the colon to the anus
• ANUS - The last part of the digestive system. It is where feces is evacuated from the body.