1 / 18

Annelidae

Annelidae. These guys try to worm their way into all ways of life. Typical dissection approach. I. General Characteristics. A. Bilateral symmetry B. Cephalization C. Coelom D. Complete digestive tract E. Segmentation F. Nephridia G. Circulatory system H. Hydrostatic skeleton.

birch
Download Presentation

Annelidae

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. Annelidae These guys try to worm their way into all ways of life

  2. Typical dissection approach

  3. I. General Characteristics • A. Bilateral symmetry • B. Cephalization • C. Coelom • D. Complete digestive tract • E. Segmentation • F. Nephridia • G. Circulatory system • H. Hydrostatic skeleton

  4. II. Organ systems • A. Digestive System • 1. muscular pharynx • 2. esophagus • 3. crop • 4. gizzard • 5. intestine

  5. B. Nervous system • 1. ganglia • 2. ventral nerve cord

  6. C. Circulatory system • 1. closed circulatory system • 2. dorsal blood vessel • 3. five pairs of pseudohearts • 4. ventral blood vessel • 5. capillary network

  7. D. Reproductive system • 1. hermaphroditic • 2. male parts • 3. swapping of sperm • 4. clitellum • 5. female parts impossible to find for average

  8. The Great Exchange

  9. Fertilized eggs released in a cocoon

  10. E. Excretory system-nepridium • 1. almost every segment has a nepridium

  11. nephridium

  12. III. Classes of annelids • A. Oligochaets • 1. setae not huge • 2. useful for anchorage during locomotion • 3. sequence of muscle contraction

  13. B. Polychaets • 1. parapodia • 2. much more elaborate • 3. locomotion • 4. moving fluid through tubes • 5. excavation in marine worms • 6. respiratory surfaces

  14. Polychaet-feather duster worm

  15. Christmas Tree Worm

  16. C. Hirunidea-leeches • One of man’s best friends

  17. Wonderful story • http://www.youtube.com/watch?v=ak6MX-QFRVc&NR=1 http://www.youtube.com/watch?v=SxZbzZ5RE40&feature=related

  18. Cross section • 1. coelom • 2. dorsal blood vessel • 3. ventral nerve cord • 4. muscle layers • 5. typhlosole • 6. nephridia • 7. setae

More Related