living organisms

• There are millions of species on our planet
• Although species can be very different from each other, many have similar features that allow us to 
• put them into groups. 
• This is classification.

• The first big divison of living things in the classification system is to put them into one of five kingdoms
• These are vased on what an organisms cells are like.
• The five kingdoms are
• animals
• fungi ( moulds, mushrooms, yeast)
• plants ( all green plants)
• prokaryotes(bacteria, blue -green algae)
• protoctists(Amoeba,chlorella and plasmodium)

• Living things can then be ranked according to:
• Phylums
  
• order
• class
• family
• genus
• species

Nematodes are tiny, thin worms without segments. Many species are free livin but others are parasites that cause diease. For example ,hookworma can infect humans.

Annelids are segmented worms with soft-bodies> Most of the worm's body consits of identical segments,giving it a 'ringed' appearance.