Deuterostomes
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Last updated 4:36 AM on 3/9/25
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17 Terms
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Deuterostomes
Animals with bilateral ancestors and radial symmetry.
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Phylum Echinodermata
Marine animals with calcium endoskeletons.
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Radial symmetry
Body plan evolved from bilateral ancestors.
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Calcium-containing endoskeleton
Internal skeleton providing structure and support.
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Water-vascular system
Fluid system enabling movement through tube feet.
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Tube feet
Extensions used for movement and feeding.
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Pedicellariae
Tiny claws keeping surfaces clear of debris.
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Catch collagen
Connective tissue changing between solid and liquid states.
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Phylum Chordata
Group characterized by notochord and nerve cord.
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Notochord
Rod of cells providing skeletal support.
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Dorsal nerve cord
Hollow nerve cord running along the body.
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Pharyngeal slits
Openings in the throat for filter feeding.
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Muscular post-anal tail
Tail structure evolved for aquatic locomotion.
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Cephalochordates
Lancelets, small filter-feeders in sandy bottoms.
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Urochordata
Tunicates, filter-feeding adults with siphons.
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Vertebrates
Animals with backbones and two Hox gene sets.
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Neural crest cells
Cells contributing to bone and cartilage structures.
Note 
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