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Annelida cami correa

Annelida cami correa. Reason for the name. Also called ringed worms From French annelés  " ringed ones ", ultimately from Latin anellus  " little ring " . Number of species existing . 15,000 to 17,000 modern species Leeches; Hirudinea Sand worms ; Polychaeta

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Annelida cami correa

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  1. Annelidacamicorrea

  2. Reason for the name • Alsocalledringedworms • FromFrenchannelés "ringedones", ultimatelyfromLatinanellus "little ring"

  3. Number of species existing • 15,000 to 17,000 modernspecies • Leeches; Hirudinea • Sandworms; Polychaeta • Earth Worms; Oligochaeta

  4. First Fossil Record • 1st fossils found from 2 billion yrs ago. • Precambrian era

  5. Special Features • Hydrostatic skeleton • Symmetrical animals • Have a digestive and closed circulatory systems • Have legs attached to every segment.

  6. Life Cycle • Lay their eggs in their cocoon that they deposit into the soil. • When adults the reproduce either asexually or sexually depending on the species. • Their average life span is 7 years. ç

  7. Digestive System • Consists of a: • Gizzard (not a very developed brain) • Pharynax (pulls in the food into the esophagus) • Crop • Mouth and Buccal cavity

  8. Respiratory System • Unlike other worms this has the beginnings of lungs which consist of gills. • They diffuse through the skin to obtain oxygen and expel carbon dioxide.

  9. Circulatory System • 5 hearts around the esophagus. • Dorsal blood vessel.

  10. Sensory System • Underdeveloped brain found in the head connected by a ring of nerves. • They usually have: • Eyes • Tentacles • Taste buds

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