Encyclopedia: Chordate
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Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. They are united by having, at some time in their life cycle, a no...
en.wikipedia.org/wiki/Chordate
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The Chordata is the animal phylum with which everyone is most intimately familiar, since it includes humans and other vertebrates. However, not all chordates are vertebrates.
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www.ucmp.berkeley.edu/chordata/chordata.html
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All chordates share four basic features. Chordates derive their name from one of their synapomorphies, or derived features indicating their common ancestry. This is the notochord , a semi-flexible rod running along the length of the animal. In those chordates which lack bone, muscles work against the notochord to move...
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www.ucmp.berkeley.edu/chordata/chordatamm.html
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When you are done reading this, take the Chordates Quiz Chordates are animals with backbones. Animal groups in the chordate phylum include fish, amphibians, reptiles, birds and mammals. Most chordates have two eyes and at least a minimal system of hearing as fish do underwater. Many have excellent hearing.
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www.mcwdn.org/Animals/Chordate.html
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In some non-vertebrate chordates and fishes the notochord persists as a laterally In many of the non-vertebrate chordates, such as tunicates and...
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Chordates are a diverse group of animals that comprise the phylum Chordata. There are approximately 44000 species of chordates, ranging in size from several...
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science.jrank.org/pages/1459/Chordates.html
science.jrank.org/pages/1459/Chordates.html
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Chordates have their skeletons on the inside, a design that allows for growth without the need for molting. Of the approximately 50,000 living chordates, 97% are vertebrates -- animals whose skeletons include a backbone.
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www.pbs.org/kcet/shapeoflife/animals/chordates.html
www.pbs.org/kcet/shapeoflife/animals/chordates.html
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Phylum Chordata; (Click on picture for more info) Overview. More on the chordates is here. A Chordate review PDF is here Another way is here Segmentation and Vertebrate Origins. Be sure to go forward through the entire article.
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cas.bellarmine.edu/tietjen/images/phylum_chordata_overv...
cas.bellarmine.edu/tietjen/images/phylum_chordata_overview.htm
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Four distinctive derived characteristics of chordates distinguish them from their ancestors: D. Endostyle - elongated groove in the pharynx floor of protochordates that may develop as the thyroid gland in chordates...
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www.shsu.edu/~bio_mlt/Chap2.html
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