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39 Cards in this Set
- Front
- Back
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Protostomes
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Formation of the mouth from the Blastopore
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Deuterostomes
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Formation of the anus from the Blastopore, then the mouth from a secondary opening
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Asteroidea
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Class of Echinoderms encompassing Sea Stars
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Ophiuroidea
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Class of Echinoderms encompassing Brittle Stars
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Echinoidea
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Class of Echinoderms encompassing Sea Anemones and Sand Dollars
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Holothuroidea
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Class of Echinoderms encompassing Sea Cucombers
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Water Vascular System
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System of fluid-filled closed tubes and ducts used to move tentacles and tube feet used in locomotion, feeding and respiration
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Tube Feet (Podia)
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small, muscular fluid filled tubes which extend to aid in locomotion, clinging, feeding and respiration
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Madreporite
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Small structure on the aboral surface providing intake for the water vascular system
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Pedicellaria
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Small pincer-like organs on the surface of certain Echinoderms
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Papulae
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"skin gills" used in respiration
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Bursae
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Sacklike cavity in Brittle Stars functioning in respiration and reproduction
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Hemal System
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System of small vessels, function is to distribute digested nutrients around the body
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Peritoneal Cilia
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structures lining the body wall which function in movement of body fluids
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Peristomial Membrane
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Soft area surrounding the mouth of Asteroidea
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Ambulacrum (Ambulacral Area)
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Radiating grooves where podia of the water-vascular system are found (Asteroidea)
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Radial Nerve
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superficial tube located between the rows of tube feet in the ambulacral grooves of Asteroidea
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Catch Collagen
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Connective tissue which holds together the ossicles comprising the endoskeleton of Asteroidea
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Stereom
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Meshwork structure of endoskeletal ossicles unique to Echinoderms
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Gastric Ligaments
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Prevent excessive eversion of the cardiac stomach during feeding (Asteroidea)
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Pyloric Ceca
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Digestive glands which are present in each arm and connect to the pyloric stomach (Asteroidea)
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Axial Complex
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Component of the Hemal system which pressure filters blood vascular fluids
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Oral (Ectoneural) System
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Consists of a nerve ring around the mouth, and a main radial nerve in each arm
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Deep (Hyponeural) System
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This system lies just aboral to the Oral Neural System
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Aboral System
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Consists of a nerve ring around the anus, and radial nerves in the roof of each arm
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Epidermal Nerve Plexus
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Freely connects the three neural systems of Echinoderms to the body wall and other related structures
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Ocelus
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Sense organ at the tip of each arm (Asteroidea). React mainly to touch, temperature, chemicals and light intensity.
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Bipinnaria Larva
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Free swimming larval stage
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Brachiolaria Larva
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Larval stage with adhesive arms and suckers, attaches to a substrate for development to continue
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Radial Juvenile
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Juvenile stage which detaches from substrate with the development of arms and tube feet
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Ophiopluteus
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Free swimming larva of the class Ophiuroidea
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Test
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Endoskeletal component enclosing the body of Echinoidea
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Periproct
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Region of aboral plates around the anus in Echinoidea
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Aristotle's Lantern
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Masticating (chewing) apparatus present in some sea urchins
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Echinupluteus
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Planktonic larvae of some nonbrooding Echinoidea
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Cloaca
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Terminal portion of Holothuroidea's digestive tract which functions in respiration, excretion and reproduction
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Sole
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Side of the Holothuroidea applied to the substrate
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Auracularia
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Free swimming larva of Holothuroidea
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Cuvarian Tubules
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Certain species of Holothuroidea expel these tube structures (which sometimes contain toxins) to entangle predators
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