stages of digestion n.
Skip this Video
Loading SlideShow in 5 Seconds..
Stages of Digestion PowerPoint Presentation
Download Presentation
Stages of Digestion

Loading in 2 Seconds...

play fullscreen
1 / 8

Stages of Digestion - PowerPoint PPT Presentation

  • Uploaded on

Stages of Digestion. Four Stages of Digestion. Ingesting Digesting Absorbing Eliminating. Stage 1:Ingesting. The starting point of the digestion process. . Stage 2: Digesting. Mouth: Mechanical and Chemical digestion begins.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
Download Presentation

PowerPoint Slideshow about 'Stages of Digestion' - albert

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
four stages of digestion
Four Stages of Digestion
  • Ingesting
  • Digesting
  • Absorbing
  • Eliminating
stage 1 ingesting
Stage 1:Ingesting
  • The starting point of the digestion process.
stage 2 digesting
Stage 2: Digesting
  • Mouth: Mechanical and Chemical digestion begins.
  • Mechanical digestion is the chewing and breaking food down into smaller pieces
  • Each small piece of food is a bolus
  • Saliva lubricates the food, and contains an enzyme, called amylase.
  • Chemical digestion occurs when amylase begins to break down complex carbohydrates.
Esophagus: as food passes through the pharynx, the epiglottis covers the airway tube.
  • The food moves on to the esophagus.
  • The esophagus is a tube that connects the pharynx and the stomach.
The esophagus is long and muscular
  • The bolus is pushed through the esophagus in a process called peristalsis.
  • Your stomach is like a stretchable muscular bag.
  • Inside the stomach is gastric juice, which is very acidic.
  • The stomach walls are lined with mucus, that protects the tissue.
  • Pepsin is an enzyme which breaks down protein, and needs an acidic environment.
  • The bolus breaks down into a liquid called chyme.
small intestine
Small Intestine
  • Once the chyme leaves the stomach, it empties into the small intestine.
  • The first metre is called the duodenum. Digestion is complete after foods leaves.
  • Within the first 30 cm are ducts that connect to other organs.
  • Pancreas: produces enzymes
  • Liver: produces bile.