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Worms - Page Text Content

BC: Bibliography: -Biology "Prentice Hall" Txbk

FC: Worms | Daniela & Ana Laura

1: What is a Worm? | - Non-arthropod invertebrate animals - Have a long cylindrical tube-like body and no legs.

2: Flatworms | -Soft, flattened worms that have tissues and internal organ systems. -They are the simplest animals to have three embryonic germ layers, bilateral symmetry, and cephalization.

3: Phylum: Platyhelminthes

4: Turbellarians | Class: Turbellaria -Free-living flatworms -Live in marine or fresh water

5: Groups of Flatworms | Flukes | Class: Trematoda -Parasitic flatworms -Infect the internal organs of their host

6: Schistosoma Fluke | -Causes schistosomiasis in humans. -Disease in which the eggs clog blood vessels, causing swelling and tissue decay in the lungs, liver, spleen, or intestines.

8: Tapeworms | Class: Cestoda -Long, flat, parasitic worms that are adapted to life inside the intestines of their hosts.

10: Roundworms | -They are unsegmented worms that have pseudocoeloms and digestive systems with two openings- a mouth and an anus.

11: Phylum: Nematoda

12: Roundworms and Human Disease | Trichinosis-Causing Worms | Caused by Trichinella. The larvae travels through the blood stream and burrow into organs and tissues causing terrible pain for the host.

13: Filarial Worms | Are threadlike worms that live in the blood and lymph vessels of birds and mammals, including humans

14: Ascarid Worms | Ascaris lumbricoides is a serious parasite of humans and other vertebrate animals. This disease is commonly spread by eating vegetables or other foods that are not washed properly. This worm absorbs the digested food from the host’s small intestine

16: Annelids | Are earthworms that you see wriggling around in the soil | Phylum: Annelida

17: -Are worms with segmented bodies. -They have a true coelom that is lined with tissue derived from mesoderm.

18: Groups of Annelids | Oligochaetes | Class: Oligochaeta -Typically have streamlined bodies and relatively few setae compared to polychaetes. -Live in soil or fresh water

19: Leeches | Class: Hirudinea -Are typically external parasites that suck blood and body fluids of their hosts.

20: Polychaetes | Class: Polychaeta -Are marine annelids that have paired, paddlelike appendages tipped with setae.

21: Ecology of Annelids | The tunnels these worms make provide passageways for plant roots and water and allow the growth of beneficial, oxygen-requiring soil bacteria. Worms also “mine” minerals from deeper soil layers, bringing them up to the surface. Other animals like moles, skunks, toads, and snakes also eat earthworms.

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  • By: Daniela R.
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  • Title: Worms
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  • Started: about 7 years ago
  • Updated: about 7 years ago