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In animal anatomy, the notochord is a flexible rod made out of a material similar to cartilage. If a species has a notochord, it is, by definition, a chordate. ... In some chordates, it persists thr...

Echinoderms and Invertebrate Chordates - McGraw-Hill Education


Chapter 29: Echinoderms and Invertebrate Chordates. Echinoderms ... 3, An animal that retains its chordate features throughout life is the _____. Need a Hint ?



Four distinctive derived characteristics of chordates distinguish them from their ... and must obtain food by siphoning sea water through its body and trapping food ... not be retained throughout life for an animal to be considered a chordate.

Characteristics of Chordata - Boundless


Animals in the phylum Chordata share four key features: a notochord, a dorsal ... The notochord provides skeletal support, gives the phylum its name, and develops ... acts as the primary axial support of the body throughout the animal's lifetime. ... The Cambrian Explosion of Animal Life, and Characteristics of Vertebrates.

What's a Tunicate?


It even looks like a tiny tadpole, and has a nerve cord down its back, similar to the ... to detect light, and an otolith, which helps the animal orient to the pull of gravity. ... tail and recycle them to build new structures needed for their adult way of life. ... intricate mucous "houses" and retain their larval tail throug...

chordate features


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 ...

Chordata Facts, information, pictures | Encyclopedia.com articles ...


The three features unique to chordates and found in all of them at least during early ... into the head and keeps the animal from telescoping when its muscles contract. .... Throughout life, hagfish and lamprey retain the notochord, a supporting ...

Notochord - New World Encyclopedia


Nov 21, 2008 ... The higher chordates were built on the foundation of this model ... defining characteristics of the phylum Chordata, along with the presence of a hollow ... Lancelets (suphylum Cephalochordata) retain the notochord throughout their lives ... the hagfish and lampreys, the notochord remains throughout life and ...

chordate | animal phylum | Britannica.com


Vertebrates retain traces of a feeding apparatus like that of tunicates and cephalochordates. ... The chordate life cycle begins with fertilization (the union of sperm and egg). In its primitive form, fertilization occurs externally, in the water. .... these animals possess gill slits and other features not found in other animal phyla .

Chapter 34 - Vertebrates | CourseNotes


These chordate characteristics are a notochord; a dorsal, hollow nerve cord; pharyngeal ... It provides skeletal support throughout most of the length of the animal. ... The tunicate larva uses its tail muscles and notochord to swim through the water in ..... Many amphibians do not live a dualistic—aquatic and terrestrial— life.

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Animal Kingdom Test Review Flashcards


Apr 19, 2012 ... The animal's digestive tract form from the ______. ... An animal that retains its chordate features throughout life is the _____.

Chapter Synopsis - McGraw Hill Higher Education


For simplicity, however, this text retains the traditional Linnaean classification, ... Most zoological texts follow the traditional approach because of its ease and familiarity. ... The four chordate characteristics are the notochord, dorsal tubular nerve ... In the protochordates and jawless vertebrates, it is persistent throughout l...

Branches on the Tree of Life: Chordates - BioMEDIA Associates


In tunicates, the chordate characteristics can be observed only by examining ... A related group, the larvaceans (Appendicularians), live throughout the life ... periods of swimming, such as when the animal is dislodged from the sand. ... ( Class Crossopterygia), developed bones at the base of its four stout ventral paired fins.