Echinoderms Flashcards
Deuterostomate means…
The first blastula opening becomes the anus
Echindoderms are _________ as young adults.
Sessile
The endoskeleton is composed of ______________ called _______________.
Calcareous plates, ossicles
The plates within the endoskeleton are held in place by ______________.
Collagen ligaments
Larvae shows ____________ symmetry, but adults show ___________ symmetry.
Bilateral, pentaradial
The primitive features of echinoderms are…
No brain, no cephalization, few specialized organs, and blood vascular systems reduced or absent
Echinoderms are covered by…
A pigmented epidermis
Echinoderms have _________ on their skin that are extensions of the _________.
Spines, cuticle
The spines on echinoderms are surrounded by ___________ that help to _____________ and _____________ the endoderm.
Pedicellaria, food capture, cleaning
Papulae form by extensions of the _________ and allows for the ________________ out of the body
Coelom, diffusion of gases and wastes
The section of the nervous system that surrounds the oral side of the echinoderm and radiates out into its arms is…
The nerve ring
__________ are embedded in the epidermis and on sensory tentacles.
Tactile receptors
Echinoderms have a _________ embedded at the end of each arm.
Simple eye
The mouth can also be called ___________ and sometimes has ____________.
Aristotle’s lantern, chewing parts
The cardiac stomach has a special feature where it can be ____________ to allow for ____________ of larger prey.
Everted, external digestion
The pyloric stomach connects to the ________, which carry _________ to each arm.
Cecas, nutrients
The circulatory system of echinoderms is very…
Basic
The coelom is filled with…
Fluid and unspecialized cells
The circulatory system surrounds the __________ and extends into the __________.
Stomach, arms
(General) The water vascular system provides…
Locomotion
(General) The order in which the water vascular system operates is…
Madreporite, stone canal, ring canal, radial canal, ampulla, tube feet
(General) Ampulla ___________ into tube feet.
Forces water
Papulae excretes ______________ and exchanges ____________.
Nitrogenous waste, gases
Sexes are mostly…
Dioecious
