Classification of Chordate Vertebrates

Classification of Chordate Vertebrates - Classification of...

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I) Can divide animals into phyla. A) Arthropoids- jointed animals (crabs) B) Anniealids - segmented worms C) Echinodermota- spiny skin animals (star fish, sea erchands) D) PHylam chordate- this is were we will focus and specifically on the subphylum chordata E) Chordata II) Chordate Body Plan A) Brachiostoma, Ammaocoetes have all of the major chordate characteristics: gill slits in the side of the body, dorsal nerve chord, and a notochord. B) Name chordate is derived from the structure notochord that comes from the greek word noto and latin word chorda thus back string. C) All members of the phylum chordate will have the notochord as a larva and some throughout the rest of their adult life. D) Notochord- 1) rod like simi-ridgid structure 2) notochord covered by a fibrous sheath (tough) that is then covered by an elastic sheath (more flexible) 3) the cells are thick wall cells that are densely packed together 4) they are filled with a semi-fluid material 5) the sheaths give support and are classified as connective tissue (tissue that binds other tissues together, made of a few different types of fiber) 6) Stiffness has to do with the turgidity of the cells in the notochord proper. 7) Notochord extends the length of the body and lies between the nerve chord and the digestive track. 8) Purpose to stiffen and support the body.
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This note was uploaded on 09/19/2011 for the course 1 101 taught by Professor Larrydavid during the Spring '11 term at South Carolina.

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Classification of Chordate Vertebrates - Classification of...

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