1 / 24

Invertebrate Phylum ANNELIDA (Segmented Worms )

Invertebrate Phylum ANNELIDA (Segmented Worms ). Vocabulary Setae = tiny bristles projected from body to help move and dig Castings = dirt and waste as feces Gizzard = a muscular region of the digestive tract that breaks down food particles Crop = structure that stores soil.

cuyler
Download Presentation

Invertebrate Phylum ANNELIDA (Segmented Worms )

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. Invertebrate Phylum ANNELIDA (Segmented Worms)

  2. Vocabulary Setae = tiny bristles projected from body to help move and dig Castings = dirt and waste as feces Gizzard = a muscular region of the digestive tract that breaks down food particles Crop = structure that stores soil

  3. Characteristics A. Body shape = cylindrical with segments B. Color = pale red varying from dull pink to brown C. Size = a few centimeters D. Lifespan = few weeks to ten years

  4. Characteristics E. Body = thick in the middle and tapers off at each end F. Senses = touch only G. Reproduction = hermaphrodites, but cannot reproduce with themselves

  5. Locomotion • A. Muscles • a. Circular outer muscles allows the worm to grow longer and thinner • b. Longitudinal inner muscle allows the worm to shrink and widen • B. Setae • a. Tiny hairs hook into the ground • allowing worm to push forward

  6. Digestion (Plays an important roll in making soil more fertile) A. Burrows and help bring oxygen to plant roots B Feed on soil and organic matter at the same time

  7. Digestion C. Eliminates dirt and waste as feces called castings D. Gizzard grinds dirt and soil in the worm’s digestive tract E. Food is digested and absorbed by the blood after it goes through intestines

  8. Other Annelids • A. Leeches (mostly freshwater; can be found in moist soil) • a. parasites of vertebrates (use jaws to drink blood from host) • b. can be used in surgery to prevent clotting

  9. Other Annelids C. Sand worm (found at tide level) a. eat small, animals b. have hard pointed jaw

  10. Seminal Receptacles Crop Pharynx Gizzard Intestine Esophagus Aortic Arches Seminal Vesicles Nephridium

More Related