digestive system of insect

Digestive system

• The alimentory canal of insects is long muscular and tubular structure .It differentiate in three region :foregut midgut  hindgut 

1.Foregut 

• Ectodermal origin 
• Inner cuticle present
• Foregut area include terminal mouth part lead into Peroralcavity.
• Peroralcavity between epipharynx and hypopharynx is cibarium.
• Pharynx :a well masculated organ present behind the mouth
• Function of the food in into oesophagus
• Act as Sucking pump in sap feeder.
• Corp: acting as food is reservior
• In bees corp is card as a honey is stomach. 
• Posterior part of foregut------Proventriculus or gizzar.it found only solid feeder.

:Food travel from foregut to midgut through cardiac valve or oesophagusvalve

2.Midgut:

• Main site of digestation is Midgut 
• Endodermal origin it also known as mesitron but no cuticle present midgut is made up of 3 epithelial cells  secretory cells gloobelt cell regenerative cell
• Function lubricate and facilities food movement protect the midgut epithelial cells

3.Hindgut

• Ectodermal origin cuticle is present it is permeable to salt ions amino acids and water absorption of salt water and other useful substance from the feaece and urine.
• Hindgut is differentiate ileum colon and rectum
  

 As  i mentioned earlier that the alimentary canal is long tube like structure extending from mouth to anus it many divided into three reason forgut midgut hindgut Mouth lead pharynx to the narrow tube like structure called oesophagus distal end oesophgus are called corp.corp it is useful to store a food piror  to digestion then food move into a proventriculus where six chitin cuticle teeth are present which  help  in reducing to its size.

Midgut : main site of digestion and assimilation

hindgut divided into ileum colon and rectum.

Elementary Canal at the junction of midgut and hindgut are many yellow hair like structure called malphigian  tabule which help in eliminate  of the nitrogenous waste.