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4/14 Organismal Biology Notes

by: Emma Cox

4/14 Organismal Biology Notes BIOL 1030 - 002

Marketplace > Auburn University > Biology > BIOL 1030 - 002 > 4 14 Organismal Biology Notes
Emma Cox
GPA 4.0

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About this Document

Notes from lecture 4/14 covering Phylum Annelida
Organismal Biology
Debbie R. Folkerts
Class Notes
phylum, annelida
25 ?




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This 2 page Class Notes was uploaded by Emma Cox on Sunday April 17, 2016. The Class Notes belongs to BIOL 1030 - 002 at Auburn University taught by Debbie R. Folkerts in Summer 2015. Since its upload, it has received 21 views. For similar materials see Organismal Biology in Biology at Auburn University.


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Date Created: 04/17/16
Lophotrochozoa PHYLUM ANNELIDA  Segmented woms o Protostome, eucoelomate, trochophore larvae o Metamerism (segmented) – somites (body units)  Adaptation for burrowing  Burrowing  Extended-anchor-pull  Circular and longitudinal muscles o Circular – when contracted = extend length of worm o Longitudinal – make worm short and fat  Chaetae – retrorse and retractable o Repetition of organs, ex. metanephridia (each and every separate excretory system)  Nephrostome  Post septal coiled tubule  Capillary network  Nephridiophore  Class Oligochaeta o Relatively few chaetae (bristles) o Marine, freshwater, and terrestrial o Tubifex tubifex, stylaria, giant earthworms o Clitellum  Mucus production for mutual sperm transfer and cocoon formation  Hermaphroditic  Female pores anterior to male pores  Seminal groove (sperm groove) – when sperm are released from the male gonopore, they travel down that tube  Mucus produced at clitellum forms a cocoon  Class Polychaeta o Many chaetae o Errant and sedentary marine worms o Nereis – sandworm  Errant  Parapodia – for stepping and walking, on every segment o More developed head o Sea mouse o Chaetopterus  Parchment tubeworm  Sedentary  Heteronomy o Sabellids  Feather duster, fan worms  Sedentary  Radioles o Lugworm – Arenicola  Sedentary burrowers  Castings o Pololo – Eunice viridis  Errant  Epitoky (atoke + and epitokes)  Nymphomaniac zombies ?  Class Hirudinea o Parasitic and predaceous leeches o Freshwater, marine, terrestrial o No chatae o No internal septae o Ectoparasites o Hiruda medicinalis – medicinal leech  Stylets within anterior sucker  Salivary secretions  Anaesthetic  Anticoagulant  antiseptic


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