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Comp Anatomy Ch. 2

QuestionAnswer
Coelomates organisms with a coelomic cavity
What is a coelomic cavity? Body cavity surrounded by Mesoderm.
Protostomes blastopore develops into the mouth. Anus develops secondarily.
Deuterostomes blastopore develops into the anus. Mouth develops secondarily.
Characteristics of all Chordates Notochord Pharyngeal Slits Dorsal and Tubular Nerve Chord Postanal Tail Thyroid Gland or Endostyle.
Notochord mesodermal and dorsally located
Pharyngeal Slits slits in wall of pharynx
Dorsal and Tubular Nerve Chord derived from ectoderm. Invagination of neural plate.
Protochordate Characteristics All marine, Feed using cilia and mucus.
3 kinds of Protochordates Hemichordates Urochordates Cephalochordates
Hemichordates Marine Worms Pharyngeal Slits Dorsal hollow nerve chord No Notochord No Post-anal Tail
Urochordates Early stage has all 4 Chordate characteristics. Pharynx expanded into brachial basket Ascidian larvae planktonic
Cephalochordate Have all four characteristics Suspension feeders
Created by: DesignerCM
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