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A slow-moving or sessile marine deuterostome with a water vascular system and, in larvae, bilateral symmetry. Echinoderms include sea stars, brittle stars, sea urchins, feather stars, and sea cucumbers.
Bilatterally symmetrical free swimming larvae of the starfish
calcified plates that make up echinoderm endoskeleton
in echinoderms, a network of water-filled canals that function in movement, food gathering, and as a basic circulatory system
hydraulic, hollow, thin-walled tubes that end in suction cups and enable echinoderms to move
class of echinoderms that contains sea lilies and feather stars
class of echinoderms that contains brittle stars and basket stars
class of echinoderms that includes sea urchins and sand dollars
class of echinoderms including the sea cucumbers
class of echinoderms that includes sea stars
the side of the starfish where the mouth is
The surface opposite the mouth (or oral surface) in cnidarians, comb jellies, and echinoderms.
tiny pincers that are used for surface maintenance by sea stars and some sea urchins
sievelike structure through which the water vascular system of an echinoderm opens to the outside
in echinoderms, a short canal that connects the madreporite to the ring canal around the mouth
a structure in echinoderms that runs the length of the arm, is part of the water vascular system
in echinoderms, a circular canal that is near the mouth and that is part of the water-vascular system
in echinoderms, the round, muscular structure on a tube foot that aids in locomotion
connected to the esophagus; sea star can turn inside out through its
mouth when it feeds
in Echinoderms, this stomach receives food from the cardiac stomach and connects to a pair of digestive glands in each arm
one of the many hollow tubes that project from the surface of a sea-star through which gas exchange and nitrogen excretion takes place
nervous system of a sea star; encircles the mouth
in echinoderms, a nerve that runs from the nerve ring down each arm
All animals that have backbones
are the most diverse group of chordates, and all have a segmented backbone and a skull that encloses the brain.
Subphylum of chordats
• All chordate characteristics retained in ADULTS
• Burrow into sand exposing only anterior end.
• Mucus across pharyngeal slits traps food from water drawn into mouth. Food goes down digestive tube-water goes out slits.
This subphylum of Chordata is composed of marine animals that look like small sacs, the adults are sessile, filter sea water through slits, no notochord, nerve cord, or tail, larva are free swimming with all features, common name: Tunicates
an opening in the lancelate where water leaves the body
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