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Zoology Student Outline – Annelids
Annelids
Phylum: Annelida
Class: Polychaeta
Class: Clitellata
Subclass: Oligochaeta
Subclass: Hirudinea
Text: Zoology, by Miller and Harley – chapter 13
1.
Phylum Annelida
A.
Introduction
i.
Segmentation
a.
•
Locomotion
•
Reiteration of life support organs
•
Specialization
Septa
ii.
Metamerism
iii.
Tagmatization
iv.
Coelom
v.
Hydrostatic Skeleton
vi.
Nervous System
viii.
Closed Circulatory System
ix.
Excretory System
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Zoology Student Outline – Annelids
a.
x.
Nephridia
Reproduction
a.
Hermaphroditic
b.
Trochophore Larvae
2.
Annelid Origins
A.
Hypotheses
i.
If Coelom  Schizocoelom
Then, flatworm origin
ii.
If Enterocoelous Coelom  Schizocoelom
Then, Diploblastic animal origin
B.
Labatocerebrum
3.
Annelid Classification
B.
Class Polychaeta (Marine Worms)
i.
Locomotion
a.
Parapodia
•
b.
ii.
Respiratory Functions
Setae
Feeding
a.
Prostomium
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Zoology Student Outline – Annelids
iii.
b.
Peristomium
c.
Filter Feeders
d.
Predators
e.
Herbivores and Scavengers
Digestive Tract
a.
Pharynx
b.
Crop
c.
Gizzard
d.
Intestine
iv.
Gas Exchange and Circulation
v.
Nervous System
a.
Anatomy
•
Brain
•
Gangia
•
Eyes
*
vi.
Negatively Phototropic
Excretion
a.
Protonephridia
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Zoology Student Outline – Annelids
b.
vii.
B.
Metanephridia
Reproduction
Class Clitellata
i.
Sublass Oligochaeta (Earthworms)
a.
Locomotion
•
Functions
*
Feeding
*
Moisture
b.
Respiration
c.
Nervous System
•
d.
Giant Axon
Excretory system
•
Metamephridia
•
Chloragogen Tissue
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Zoology Student Outline – Annelids
e.
Digestive System
•
Mouth
•
Pharynx
•
Crop
•
Gizzard
•
Intestines
*
Typhlosole
*
Chloragogen Tissue
f.
Circulatory System
g.
Reproduction
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Zoology Student Outline – Annelids
ii.
•
Hermaphroditic
•
Positioning
•
Ciliated Funnels
•
Clitellum
•
Slime Tube
•
Cocoon
Sublass Hiruinea (Leeches)
a.
Species Numbers
b.
Feeding
c.
Segmentation
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Zoology Student Outline – Annelids
•
k.
Annuli
d.
Body Plan
e.
Suckers
f.
Predatory
g.
Prey
h.
digestion
i.
Anticoagulant (Hirudin)
j.
Hermaphroditic
Locomotion
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