1 / 10

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

kemal
Télécharger la présentation

Annelida cami correa

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related