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York University
BIOL 2030
Scott Kelly

Echinodermata Starfishcousins Echinoderamata Phylum of marine coelomate animals that are bilaterally symmetrical as larvae but show fiverayed symmetry as adults and have a calcareous endoskeleton and a water vascular system includes Crinoidea Asteroidea Ophiuroidea Echinoidea Holothuroidea Aboral Away from or opposite to the mouth Ambulacrum Elongated area of the shell of echinoderm in which a row of tubefeet is arranged Ampulla Internal reservoir on ring canal of water vascular system in echinoderms Asteroidea Class of echinoderms commonly called starfish or sea stars having a starshaped body with five radiating arms not sharply marked off from the central disc Buccal Pertaining to cheekmouth Crinoidea Sea Liliesfeather stars cupshaped body with feathery arms and areattached to the substratum by a stalk in the case of sea lilies Echinoidea Sea Urchins have a typically globular body with skeletal plates fitting together to form a rigid test Eleutherozoa Mobile animals with the mouth directed towards the substrate Holothuroidea Sea cucumbersmarine with leatherly skin and an elongated body containing a single branched gonad Interambulacrum Area of echinoderm test between two ambulacral areas Lateral Canal Perpendicular branching of the radial canal leading to the tube feet Madreporite In echinoderms a perforated plate at the end of the stone canal of the water vascular system links watervascular system to outside Ophiuroidea Class of echinoderms commonly known as brittle stars having a starshaped body with the arms clearly marked off from the central disc Oral On the same side as the mouth of radially symm Animals such as echinoderms Ossicle Any small bone or other calcified hard structure such as a plate of exoskeleton in echinoderms Papulaederam Hollow contractile pustules on epidermis of some echinoderms such as starfish having a branchiae respiratory function Pedicellariae Minute pincerlike structures studding the surface of some echinoderms which grab kill and discard small animals that touch them Pelmatozoa Subphylum of Echinodermata stalked and sedentary echinoderms Podium Foot or footlike structure such as a tube foot of echinoderm Polian Vesicles Interradial vesicles opening into ring vessel of ambulacral system of most starfish and sea cucumbers accessory storage fluid structures Radial Canal Radiate symmetrically from ring canal and run the length of the arm Sole Ventral surface of holothuroidea where the ambulacral regions with tube feet are Stone CanalCylindrical canal extending from madreporite to near mouth border in echinoderms Tube Feet Projections from the body wall in echinoderms which are connected to the water vascular system and generally used for locomotion They may also be modified to serve respiratory foodcatching and sensory functions
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