27-1 Flatworms<br />
Acoelomate<br />Animal lacking a coelom, or body cavity<br />
Coelom<br />Fluid-filled body cavity lined with mesoderm<br />
Pharynx<br />Muscular tube at the end of the gastrovascular cavity, or throat, that connects the mouth with the rest of th...
Flame Cell<br />Specialized cell that filters and removes excess water from the body of a flatworm.<br />
Ganglion<br />Group of nerve cells<br />
Eyespot<br />Group of cells that can detect changes in the amount of light in the environment.<br />
Hermaphrodite<br />Individual that has both male and female reproductive organs<br />
Fission<br />Form of asexual reproduction in which an organism splits into two, and each half grows new parts to become a ...
Scolex<br />Head of an adult tapeworm; can contain suckers or hooks.<br />
Proglottid<br />One of the segments that make up most of a tapeworm’s body.<br />
testis<br />Male reproductive organ that produces sperm.<br />
Key Concept<br />Flatworms are soft, flattened worms that have tissues and internal organ systems. They are the simplest a...
Key Concept<br />Turbellarians are free-living flatworms. Most live in marine or fresh water.<br />
Key concept<br />Flukes are parasitic flatworms. Most flukes infect the internal organs of their host.<br />
Key Concept<br />Tapeworms are long, flat, parasitic worms that are adapted to life inside the intestines of their hosts.<...
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Biology 27 1 flatworms

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Biology 27 1 flatworms

  1. 1. 27-1 Flatworms<br />
  2. 2. Acoelomate<br />Animal lacking a coelom, or body cavity<br />
  3. 3. Coelom<br />Fluid-filled body cavity lined with mesoderm<br />
  4. 4. Pharynx<br />Muscular tube at the end of the gastrovascular cavity, or throat, that connects the mouth with the rest of the digestive tract and serves as a passageway for air and food.<br />
  5. 5. Flame Cell<br />Specialized cell that filters and removes excess water from the body of a flatworm.<br />
  6. 6. Ganglion<br />Group of nerve cells<br />
  7. 7. Eyespot<br />Group of cells that can detect changes in the amount of light in the environment.<br />
  8. 8. Hermaphrodite<br />Individual that has both male and female reproductive organs<br />
  9. 9. Fission<br />Form of asexual reproduction in which an organism splits into two, and each half grows new parts to become a complete organism.<br />
  10. 10. Scolex<br />Head of an adult tapeworm; can contain suckers or hooks.<br />
  11. 11. Proglottid<br />One of the segments that make up most of a tapeworm’s body.<br />
  12. 12. testis<br />Male reproductive organ that produces sperm.<br />
  13. 13. Key Concept<br />Flatworms are 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<br />
  14. 14. Key Concept<br />Turbellarians are free-living flatworms. Most live in marine or fresh water.<br />
  15. 15. Key concept<br />Flukes are parasitic flatworms. Most flukes infect the internal organs of their host.<br />
  16. 16. Key Concept<br />Tapeworms are long, flat, parasitic worms that are adapted to life inside the intestines of their hosts.<br />

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