Term
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Definition
| Echinoderms: sea lilies, sea stars, brittle stars, sea urchins, sand dollars, sea cucumbers |
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Term
| where echinoderms are found? |
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Definition
| all marine/bottom-dwellers |
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Term
| type of symmetry for echinoderms? |
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Definition
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Term
| echinoderms: deuterostomes or protostomes? |
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Definition
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Term
| water-vascular system (echinoderms) |
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Definition
| used to power tube feet, water flow through organism, and feeding |
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Term
| type of skeleton of echinoderms? |
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Definition
| dermal exoskeleton (plates and spines) |
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Term
| pincerlike appendages that snap at anything that lands on them (echinoderms) |
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Definition
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Term
| echinoderms' skin gills are called? (for gas exchange) |
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Definition
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Term
| definite head? (echinoderms) |
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Definition
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Term
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Definition
-sea lilies & feather stars
-aboral atachment stalk of dermal ossicles
-5 branching arms w/ pinnules
-ciliated groove on oral survace w/ tube feet: collects food
-spines and madreporite
-no pedicellariae
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Term
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Definition
| sea stars (main example = Asterias (starfish)) |
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Term
| starfish arms sharply marked off from central disc? |
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Definition
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Term
| main feeding system of starfish? |
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Definition
| ambulacral grooves open with tube feet on oral side of organism; tube feet often w/ suckers |
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Term
| main structures of starfish (Class Asteroidea) |
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Definition
-aboral anus
-madreporite
-pedicellariae
-5 arms (rays)
-ampullae
-ciliated epidermis & spines
-eyespot at tip of each arm
-sensory tentacles
-madreporite plate
-pentagonal, pyloric, everted stomach
-pyloric duct & pyloric ceca
-cardiac stomach
-oral, aboral, and deep nerve systems |
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Term
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Definition
| bulblike structure water flows through; part of water vascular system |
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Term
| sensory tentacles (starfish) |
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Definition
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Term
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Definition
| allows water flow into water vascular system; provides means for locomotion |
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Term
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Definition
| rays on each side of madreporite plate |
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Term
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Definition
| other 3 rays (NOT the bivium rays) |
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Term
| location of anus on starfish? |
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Definition
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Term
| oral nerve system (echinoderms) |
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Definition
| consists of nerve ring around mouth and radial nerve through each arm |
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Term
| epidermal nerve plexus (echinoderms) |
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Definition
| network of nerve cell bodies that connects all 3 nerve systems |
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Term
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Definition
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Term
| brittle stars body shape? |
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Definition
-arms sharply marked from central disc
-resemble vertical columns |
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Term
| main structures of Class Ophiuroidea? |
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Definition
-vertebral ossicles
-series of plates
-triangular jaws
-oral shields (buccal shields)
-bursae
-tube feet (tentacles) |
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Term
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Definition
| openings for gas exchange |
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Term
| Class Ophiuroidea locomotion? |
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Definition
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Term
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Definition
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Term
| body structure of sea urchins? |
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Definition
-lack arms
-long, movable spines
-5 ambulacral regions w/ double rows of ambulacral plates |
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Term
| main structures of sea urchins? |
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Definition
-tubercle & cog muscles (hold spines)
-Aristotle's lantern
-peristome (surrounding mouth)
-sphaeridia
-buccal podia (part of peristome)
-pedicellariae
-ciliated epidermis
-gills
-periproct |
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Term
| Aristotle's lantern (sea urchins) |
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Definition
| feeding structure made of teeth |
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Term
| Class Echinoidea locomotion? |
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Definition
| uses spines and tube feet |
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Term
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Definition
| modified spines; believed to be organs of equilibrium |
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Term
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Definition
| area that is free of spines |
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Term
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Definition
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Term
| Class Holothuroidea body structure? |
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Definition
well...like a cucumber! (orally/aborally elongated)
-mouth & tentacles at one end, anus at the other |
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Term
| main structures of sea cucumbers? |
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Definition
-respiratory trees
-podia
- coelomic cavity w/ pharynx, stomach,intestine, & cloaca
-retractile muscles/muscle bands
-ring, stone, lateral, and radial(5)canals
-polian vesicles
-ampullae |
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Term
| respiratory trees (sea cucumbers) |
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Definition
| internal respiratory organs that run longitudinally and are attached to cloaca |
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Term
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Definition
| expansion chambers for maintaining pressure; part of ring canal |
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Term
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Definition
-notochord
-pharyngeal gill slits
-dorsal tubular nerve cord
-endostyle/thyroid gland
-postanal tail |
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Term
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Definition
| demonstrate each of the chordate characteristics at some point in their life cycle |
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Term
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Definition
| (aka: Tunicata/Tunicates) only larval forms have all chordate characteristics; adults sessile; body enclosed in "tunic" |
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Term
| Subphylum Cephalochordata |
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Definition
| lancelet; notochord and nerve cord persist throughout life |
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Term
| main structures of tunicates? |
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Definition
-siphon (incurrent and excurrent)
-tunic/test(outer covering)
-tentacles around mouth and pharynx |
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Term
| main structures of Cephalochordates? |
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Definition
-beginnings of ventral heart
-metamerica arrangement of muscles and nerves
-dorsal and ventral fins
-myotomes
-wheel organ w/ cilia |
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