The abdomen is one of the three main body segments (or tagmata) of insects. It is also the name given to one of the two main body parts of spiders although this is more commonly known as the Opisthosoma.
The abdomen is the posterior most of the segments. In most insects clear segmentation can be seen in the abdomen.
The abdomen contains the heart, reproductive organs, mid-gut and other digestive organs.
Abdomen (or Opisthosoma) is also the name given to the posterior segment in arachnids:
Other names for (or types of) Abdomen include:
- Book lung
- Compound eye
- Malpighian tubules
- Uric acid
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