Tuesday, January 11, 2011


otherwise known as : Phylum nematodes

  • one of the most diverse of animals
  • hard to distinguish
  • slender, worm-like animals, typically less than 2.5 millimetres (0.10 in) long
  • microscopic, while free-living species
  • often ornamented with ridges, rings, warts, bristles or other distinctive structures.
  • head of a nematode is relatively distinctive
  • head is radially symmetrical, with sensory bristles and, in many cases, solid head-shields radiating outwards around the mouth
  • rest of the body is bilaterally symmetrical
  • live in water and soil everywhere except the desert
  • few species are parasites of plants and animals
  • eat bacteria, fungi, and tiny growths in the soil
  • parasite species feed on blood, body fluids, intestinal contents, and mucus in their hosts
  • Most species of roundworms have two sexes, but in a few species the worms make both eggs and sperm

Done by: Nur Shamemi
Group 4: Carisa, Su En, Shamemi, Pei Shan
(Group 3, Animalia: Flatworms, Roundworms, Segmented Worms and Mollusca)

1 comment:

  1. The Roundworm, unlike cnidarians or flatworms, it has a digestive system that is like a tube with openings at both ends.