Digestive system
This presentation is the property of its rightful owner.
Sponsored Links
1 / 11

Digestive system PowerPoint PPT Presentation


  • 64 Views
  • Uploaded on
  • Presentation posted in: General

Digestive system. Digestive system. ?. mouth A. oesophagus B. stomach G. small intestine ?. Duodenum ?. digestion – bile - enzymes D. large intestine ?. the anus E. Liver F. Gall Bladder C. Pancreas . What do these words mean?. Ingestion Digestion

Download Presentation

Digestive system

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


Digestive system


Digestive system

  • ?. mouth

  • A. oesophagus

  • B. stomach

  • G. small intestine

  • ?. Duodenum

  • ?. digestion – bile

  • - enzymes

  • D. large intestine

  • ?. the anus

  • E. Liver

  • F. Gall Bladder

  • C. Pancreas


What do these words mean?

  • Ingestion

  • Digestion

  • Absorption

  • Assimilation

  • Egestion


Digestion

  • 2 types – mechanical and chemical digestion.

  • Digestion is speeded up by enzymes (biological catalysts).

  • Muscles are also responsible for moving food along the gut (circular and longitudinal muscle layers).

  • Waves of muscle contraction help push the food along the gut – peristalsis.


Digestion

Duodenum

  • The mouth, stomach and first part of the small intestine make up the duodenum.

  • They all break down the food using enzymes.

    Ileum

  • Digestion continues in the last part of the small intestine (ileum).

  • This is where the digested food is absorbed.


Digestion

  • The last part of the gut, the large intestine is mainly concerned with absorbing water out of the remains and storing waste products (faeces) before they leave the body.


Ingestion

  • Taking food into the body (very start of the digestive system).


Digestion

  • Large insoluble molecules are broken down into small soluble molecules.

  • Starch digestion begins.

  • Protein digestion begins.

  • All types of digestion occur.


Absorption

  • The transfer of digested substances from the intestine into the blood.

  • Majority of absorption.

  • Water absorption


Assimilation

  • The soluble products of digestion are taken to cells and used to make structures in the cells.

  • E.g. glucose converted to glycogen

  • Amino acids built up into proteins

  • Fatty acids and glycerol turned into lipid for storage.


Egestion

  • Removable of waste material that could not be digested.


  • Login