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...
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.
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
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...
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 ...
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
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 ...
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
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—