18 Questions
What type of symmetry do Echinoderms typically possess?
Radial symmetry
What is the function of the water vascular system in Echinoderms?
Hydraulic operation of tube feet or feeding tentacles
What is the characteristic of the body cavity of Echinoderms?
True coelom
What is the function of the calcareous plates in Echinoderms?
Providing structural support and protection
What is the characteristic of the nervous system of Echinoderms?
Circum-oesophageal ring
What is the characteristic of the body shape of Echinoderms?
Highly variable with no head
What is the main function of the coelomic lining in echinoderms?
To separate the animal's guts from its skin
What is the composition of the middle layer of the echinoderm body wall?
Connective tissue and the exoskeleton
What is the primary component of the echinoderm exoskeleton?
Calcite
What is the characteristic of the plates or ossicles that make up the exoskeleton of Sea Cucumbers?
Small and widely separated
What is the result of the continuous growth of the echinoderm exoskeleton?
Older animals are always larger than younger ones
What is the function of the spines, warts, and tubercles found on the surface of echinoderms?
To provide protection and support the exoskeleton
What is the main characteristic of the body structure of most living echinoderms?
Pentameral symmetry
What is the function of tube feet in echinoderms?
Locomotion and sensing
What is the composition of the body covering of echinoderms?
Calcite
How many arms or rays do echinoderms typically have?
Five or multiples of five
What type of symmetry do echinoderms exhibit?
Radial symmetry
What is the name of the body covering of echinoderms?
Test
Learn about Echinodermata, a phylum of marine animals including starfishes, sea urchins, and sea cucumbers. Discover their unique characteristics, such as radial symmetry and lack of freshwater or land representatives.
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