Annelids
BY: BRANDON, JOSH, MARY, REILLY
http://upload.wikimedia.org/wikipedia/commons/c/ca/Oligochaete_GLERL_1.jpg
What type of symmetry do Annelids
have?
Bilateral
symmetrical
http://www.robinsonlibrary.com/science/zoology/annelids/earthworm.htm
"Annelida - Segmented Worms." Annelida. N.p., n.d. Web. 02 Oct. 2014.
How do Annelids move?
 Segmented
body
 2 sets of muscles
Longitudinal-
expands
Circular- contracts
http://www.robinsonlibrary.com/science/zoology/annelids/earthworm.htm
"Annelida - Segmented Worms." Annelida. N.p., n.d. Web. 02 Oct. 2014.
Nervous System
http://en.wikipedia.org/wiki/Evolution_of_nervous_systems
 Primitive
 Ring
brain
of nerves to ventral chord
 Lateral
 Sense
nerves and ganglia
organs
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Digestive System
https://yhsbiology.wikispaces.com/Annelida+Videos
 Two
way
 Unsegmented
 Mouth
gut
to end
 Separated
by coelom
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Excretory System
http://osmoregulationapbio3.wikispaces.com/file/view/44_10Protonep
hridia_L.jpg/212064230/480x202/44_10Protonephridia_L.jpg
 Protonephrida
 Tubules
 Flagella
end in cell
and common duct
 Metanephridia
 Excrete
ammonia products
http://bcs.whfreeman.com/thelifewire/content/chp51/images/IQ5105.gif
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Circulatory System
 Closed,
through diffusion
 Hemoglobin
 Through
 Rest
(red/green)
head (contractile vessels)
http://earthwormsinfo.com/wpcontent/uploads/2011/08/wormbiolog
y.jpg
of body (lateral vessels)
 Contractile
act as heart
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Respiratory System
 Through
skin or gill filaments
 Diffusion
 Oxygen
carried
 Hemoglobin
or chlorocruorin
http://myclasses.naperville203.org/staff/NNHSBiology/KraftsonEco/
Animal%20Kingdom%20%20Period%202%20Picture%20Library/Anne
lida/annelida.bmp
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Support/Skeletal System
 Coelom
 Liquid
filled
 “Inflates”
annelid
http://www.anselm.edu/homepage/jpitocch/genbi101/18_03bTrueCoelom-L%20copy.jpg
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Reproductive System
 Sexual
 Some
hermaphrodites
 Most-
separate genders
http://www.robinsonlibrary.com/science/zoology/annelids/graphics/earthworm3.gif
"Annelida." The Columbia Encyclopedia, 6th Ed.. 2014, Jennifer Yeh, "Annelida." A Dictionary of Biology. 2004, Michael Allaby, and AILSA ALLABY;MICHAEL
ALLABY. "Annelida." Encyclopedia.com. HighBeam Research, 01 Jan. 2014. Web. 02 Oct. 2014.
Reish, Donald J. "Annelid (invertebrate)." Encyclopedia Britannica Online. Encyclopedia Britannica, n.d. Web. 01 Oct. 2014.
Oligochaeta (few bristles)

Specialized derived worms

About 3000 species

Less than 10 families

Mostly small and inconspicuous

Few large and terrestrial (earthworms)
http://upload.wikimedia.org/wikipedia/commons/c/
ca/Oligochaete_GLERL_1.jpg
Hansen, Armauer. Annelida = Annelida. Christiana:
Grøndahl, 1882. Print.
Oligochaeta (continued)

Inhabit moist environments

Homogenous class
http://classconnection.s3.amazonaws.com/613/flash
cards/884613/jpg/earthw11320351359586.jpg
Hansen, Armauer. Annelida = Annelida. Christiana:
Grøndahl, 1882. Print.
Polychaeta (many bristles)

Almost entirely marine

Important for benthic communities

Very diverse, heterogeneous

About 8000 species

80 families
http://www.bio.miami.edu/dana/pix/polychaete1.jp
g
Hansen, Armauer. Annelida = Annelida. Christiana:
Grøndahl, 1882. Print.
Polychaeta (continued)

Burrowers, tube dwelling, free living, and mobile

At least one pair of sensory appendages

Body wall is extended laterally (parapodia)
https://encryptedtbn0.gstatic.com/images?q=tbn:ANd9GcSdUve23jBF
QrhfqhJ-PvoHHUxegh7fvo3eirDUzT_wYpLdC8sKVw
Hansen, Armauer. Annelida = Annelida. Christiana:
Grøndahl, 1882. Print.
Hirudinea (leeches)

Derived from oligochaeta

Homologenous taxon

About 500 species

Relatively large (up to 30 cm)

Always with 34 segments
https://encryptedtbn3.gstatic.com/images?q=tbn:ANd9GcSpDjwhc4l6
hqPAmHBZTeRCkQ7-_nDIIRWH9JNZP-SkpHBvpAXnZg
Hansen, Armauer. Annelida = Annelida. Christiana:
Grøndahl, 1882. Print.
Hirudinea (continued)

Originally freshwater

Also marine and terrestrial

Parasitic or predators
https://lh5.googleusercontent.com/NodTi4TCS6U/TXj0HBxsYLI/AAAAAAAAADc/EryEpkwUZ
DA/s1600/1.jpg
Hansen, Armauer. Annelida = Annelida. Christiana:
Grøndahl, 1882. Print.
Other Phylum Facts

AKA segmented worms
 Spilt

in to sections
Living area
 Marine,
Freshwater, and terrestrial
"Phylum Annelida." Iweb. Tntech, 9 Oct. 2010. Web. 1
Oct. 2014.
<http%3A%2F%2Fcfcc.edu%2Ffaculty%2Frogers%2Fco
urses%2Fmsc174%2FLectures%2FPhylum%2520Annelia
>.
https://encryptedtbn0.gstatic.com/images?q=tb
n:ANd9GcRELdqAiBF_6jFpG4z2
Rd8OuP1LerJaLLlIi8HG294tW8Y
0LdDGRA
Hermaphrodites

Male sex organs

Female sex organs

Can’t self fertilize
https://encryptedtbn0.gstatic.com/images?q=tbn:ANd9GcTjFGTH0ac
UK5r7YzFs-f9nokY_mzXnYwz3yjF-dZ-iMLTdeZxv2g
"Phylum Annelida." Iweb. Tntech, 9 Oct. 2010. Web. 1
Oct. 2014.
<http%3A%2F%2Fcfcc.edu%2Ffaculty%2Frogers%2Fco
urses%2Fmsc174%2FLectures%2FPhylum%2520Annelia
>.
Clitellum

Raised band (Bandaid)

Near head
 14,

15, 16 segment
Forms mucus around eggs

Cocoon
"Phylum Annelida." Iweb. Tntech, 9 Oct. 2010. Web. 1
Oct. 2014.
<http%3A%2F%2Fcfcc.edu%2Ffaculty%2Frogers%2Fco
urses%2Fmsc174%2FLectures%2FPhylum%2520Annelia
>
https://encryptedtbn0.gstatic.com/images?q=tbn:AN
d9GcRPg6bmr9FSJMPSFEKffYkYAo9R4qh6a
ETAb5h05p1BTW7U4MbGw
https://yhsbiology.wikispaces.com/file/view/earthworm.gif/49088829/500x295/earthworm.gif
Esophagus
Crop
Gizzard
Male Reproductive organs
Intestine
Female reproductive organs
Hearts
Central Ganglia
Pharynx
Mouth
Ventral blood vessel
Segmental blood vessel
Clitellum
Dorsal blood vessel
Segmental Ganglion
Segmental nerves
Polychaeta- Bristle worms

Polyphyletic class of annelid worms

Each body segment has a pair of fleshy
protrusions called parapodia that have many
bristles called chaetae
https://www.google.com/search?q=worms&es_sm=93&source=lnms&tbm=isch
&sa=X&ei=kpUtVO3IN4TnoATTuIDgAw&ved=0CAgQ_AUoAQ&safe=active&ssui
=on#safe=strict&tbm=isch&q=Bristle+worms
Hirudinea- Leech

Leeches are segmented worms that belong to
the phylum annelid

Always have 34 segments

Marine and land
https://www.google.com/search?q=worms&es_sm=93&source=lnms&tbm=isch&sa=X&ei
=kpUtVO3IN4TnoATTuIDgAw&ved=0CAgQ_AUoAQ&safe=active&ssui=on#safe=strict&tb
m=isch&q=Leech