Specimens, Structures & Functions Phylum: Annelida Specimens: Whole earthworm (Lumbricus terrestris) (live fresh) Dissected earthworm Slides: earthworm internal parasites & sperm Slide: earthworm c.s. • Whole ragworm (preserved) • Whole preserved leech Structures: 1. Cerebral ganglion 2. Chaeta (pl: chaetae) 3. Crop 4. Dorsal blood vessel 5. Dorsal surface 6. Epidermis 7. Gizzard 8. Pharynx 9. Pseudohearts 10. Saddle/Clitellum 11. Segments 12. Seminal vesicles 13. Septum 14. Ventral nerve chords 15. Ventral surface 16. Chloragogenous cells 17. Parapodium Functions: A. Surface of the worm that faces down, usually facing the substrate B. Storage section of the gut that holds food before it passes into the gizzard C. Blood vessel that runs longitudinally on the dorsal side of the gut. Visible through the body wall. Blood moves posteriorly.

Specimens, Structures & Functions Phylum: Annelida Specimens: Whole earthworm (Lumbricus terrestris) (live fresh) Dissected earthworm Slides: earthworm internal parasites & sperm Slide: earthworm c.s. • Whole ragworm (preserved) • Whole preserved leech Structures: 1. Cerebral ganglion 2. Chaeta (pl: chaetae) 3. Crop 4. Dorsal blood vessel 5. Dorsal surface 6. Epidermis 7. Gizzard 8. Pharynx 9. Pseudohearts 10. Saddle/Clitellum 11. Segments 12. Seminal vesicles 13. Septum 14. Ventral nerve chords 15. Ventral surface 16. Chloragogenous cells 17. Parapodium Functions: A. Surface of the worm that faces down, usually facing the substrate B. Storage section of the gut that holds food before it passes into the gizzard C. Blood vessel that runs longitudinally on the dorsal side of the gut. Visible through the body wall. Blood moves posteriorly.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter28: Invertebrates

Section: Chapter Questions

Problem 6RQ: Most sponge body plans are slight variations on a simple tube-within-a-tube design. Which of the...

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