![Phylum Annelida: segmented worms (O and A-level biology) Phylum Annelida: segmented worms (O and A-level biology)](https://digitalteachers.co.ug/wp-content/uploads/2021/10/Bbosa3-1973x2048-1.jpg)
Phylum Annelida: segmented worms (O and A-level biology)
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Phylum Annelida: segmented worms
E.g. earthworm, leech, lungworm
![](https://digitalteachers.co.ug/wp-content/uploads/2020/02/Earthworm.png)
Characteristics of segmented worms
- Has segmented body
- It is hermaphrodite
- Has a complete digestive system
- Its excretory organ is called nephridia
- Gaseous exchange occurs over the body
- Uses chaeta for locomotion
Economic importance of earthworms
- Tunnels improve aeration and drainage of the soil
- causes decay and formation of humus
- source of food to other animals e.g. chicken
- die and rot to form manure.
- Mixes soil layer
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CATEGORIES A-level Biology
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