Chordates
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10 Terms
What are the 5 characteristics all chordates have?
Notochord, dorsal nerve chord, pharyngeal gill slits, endostyle/thyroid, and post-anal tail
What is the purpose of the notochord?
a rigid, cartilaginous-like rod that provides structural support.
What is the purpose of the Dorsal Nerve Cord?
It supplies information to the rest of the organism
is right above the notochord
What is the purpose of the pharyngeal slits?
filters things
What is the purpose of the thyroid (endostyle)?
produces helpful signals and compounds
typically along the pharynx on the ventral side
What is the purpose of the post-anal tail?
(when present) Typically assists in movement
always present in early development
What do we refer to as Urochordata?
Tunicates
What do we refer to as cephalochordata?
Lancelets
What do we refer to as vertebrata?
lampreys
Which are the closest relatives of the chordates?