Welcome to JAAN's science class!!

Big hi to all of you! I'm an undergraduate following a Bsc in bioscience. Trust me I know the feeling of surfing around the net for ages and getting nothing in return! Or getting something worthless for the time we spent surfing. So I started this blog adding the science stuff I have noted which I think might help someone in their home work. Ok then enjoy!

19 February 2011

Insects - External morphology

Basic external features of an insect


The body of an insect is mainly divided into three parts


  • Head
  • Thorax
  • Abdomen
Head contains Antennae, Compound eyes and the mouth parts. Thorax comprises three segments. Usually the thorax bears the legs and the wings.  
Abdomen is consist of 7-11 segments with appendages.

Parts of a leg

Mouthparts
Mouthparts are adapted for feeding. Mainly there are two types.
  • Chewing and biting mouthparts
  • Sucking mouthparts
Chewing and biting mouthparts of cockroach



Siphoning mouthparts of butterfly

piercing and sucking mouthparts of mosquito

Sponging mouthparts of Housefly

Lapping mouthparts of honeybee
                   
Antennae

Different kind of insects
Silverfish


Head louse

Thrips

Flea

Damselfly

Dragonfly


To know about how to make a bug collection visit http://www.cnr.berkeley.edu/citybugs/studentcorner/MakeABugCollection/MakeABugCollection.htm



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