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Phylum Project

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by

Kelsey W.

on 18 April 2014

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Transcript of Phylum Project

Phylum Project
~Body~
Symmetry:
Bilateral
Circulation, Movement, Reproduction
Circulation
:

ventral heart, with dorsal and ventral blood vessels and a closed blood system. the blood is pumped by the heart through bronchial arteries (which are also called ventral aorta) to capillaries in the gills, where blood is oxygenated.
Habitat:
- they live all over the world in both fresh and marine water
Nervous System:
- Agnatha have a hollow nerve cord surrounded by strong cartilage on their dorsal side
Phylum: Chordata

Class Agnatha:
aquatic vertebrates that are distinguished by having a
notochord
(noto = the back; chord = string) which is a skeletal rod made of cartilage supporting the body in all chordate animals at some point in their life. Agnatha (a = not, without; gnatho = jaw) includes (some extinct) eel-shaped chordates (animals in the phylum Chordata) that do not have a jaw bone
By: Kelsey West
Class: Agnatha
Chordata:
a large phylum of animals such as: Tunicates, Lancelets, and Vertebrates (which include fish, amphibians, reptiles, birds and mammals) that are distinguished by having a
notochord
(noto = the back; chord = string) which is a skeletal rod made of cartilage supporting the body in all chordate animals
Some examples are...
HAGFISH
LAMPREY
PTERASPIS
Form:
eel-shaped bodies, gills,
no jaw
Movement
: they move like a snake, their tail swinging back and forth instead of in a straight line. They have no appendages, but have a caudal fin.
(extinct)
-Works Cited-
Reproduction
: agnatha reproduce just like other fish. They reproduce by external fertilization. The female lays the eggs then the male will come and fertilize the eggs.
How they eat:
they do not have a real stomach, but rather a long gut. The agnatha eat through their mouths, usually stuck on the outside of a fish eating part of the flesh.
Getting rid of waste:
in the agnatha, the kidneys produce urine (liquid waste) and pass it to the bladders where it will be released. They have one gut opening.
- The brain is the enlarged structure just anterior to the tip of the notochord
Cool Facts!
~some agnatha, specifically hagfish, are eaten in korea
~both hagfish and lamprey have "slime glands" where as defense to predators, they will release the slime
~one of the largest lampreys or what was possibly one was over three feet long (average size: 2 1/2 ft)
Thanks!
"Agnatha." N.p., 11 Apr. 2014. Web. 18 Apr. 2014.
Carter, J. Stein. "Phylum Chordata." Phylum Chordata. N.p., 02 Jan. 2002. Web. 18 Apr. 2014. <http://biology.clc.uc.edu/courses/bio106/chordate.htm>.
N.p., n.d. Web. <http://www.edu.pe.ca/kish/grassroots/biology/bio521/website/files/vertebratetablefilledin.pdf>.
"Photos of ‘monster’ Eel Fished out of New Jersey Waters Draw 1.2 Million Views on Reddit." NY Daily News. N.p., n.d. Web. 18 Apr. 2014. <http://www.nydailynews.com/news/national/photos-new-jersey-eel-wow-viewers-article-1.1273403>.
"Chordata." Animal Diversity Web. N.p., n.d. Web. 18 Apr. 2014. <http://animaldiversity.ummz.umich.edu/accounts/Chordata/>.
"Subphylum Vertebrata, Class Agnatha." Subphylum Vertebrata, Class Agnatha. N.p., n.d. Web. 18 Apr. 2014. <http://bio.rutgers.edu/~gb102/lab_3/403am-agnatha.html>.
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