Echinodermata

• What type of organisms are Echinodermata?

  Marine invertebrates
• What is the function of the water vascular system in echinoderms?

  It aids in movement and feeding
• What are the key differences between the Echinoidea and Holothuroidea classes?

  • Echinoidea (sea urchins):
  • Globular, spiny body
  • Radially symmetrical
  • Tube feet for locomotion
  • Holothuroidea (sea cucumbers):
  • Elongated, soft-bodied
  • Bilateral symmetry
  • Tentacles for feeding
• What type of symmetry do Echinodermata exhibit?

  Radial symmetry
• What type of embryonic development do echinoderms undergo?

  Deuterostome development
• What are the classes within the Echinodermata subphyla?

  • Crinoidea: feather stars, sea lilies
  • Ophiuroidea: brittle stars
  • Asteroidea: sea stars
  • Echinoidea: sea urchins
  • Holothuroidea: sea cucumbers
• What does it mean for echinoderms to be deuterostomes?

  Their anus develops first in embryonic stages
• What is the phylum that includes echinoderms?

  Echinodermata
• What are the common names for the classes of echinoderms in the subphylum Asterozoa?

  • Ophiuroidea: Brittle stars
  • Asteroidea: Sea stars
• What are the common names for the classes of echinoderms in the subphylum Crinozoa?

  • Crinoidea: Feather stars, sea lilies
• What ability do many echinoderms have regarding their limbs?

  They can regenerate lost limbs
• What system do Echinodermata use for movement?

  Water vascular system
• How does the symmetry of echinoderms differ from that of humans?

  Echinoderms have radial symmetry, humans have bilateral symmetry
• What is the body shape of Ophiuroidea?

  Disk-shaped body with long, flexible arms
• How many main classes are there in Echinodermata?

  Five main classes
• Describe the body structure of Asteroidea.

  Flat body with short, stiff arms
• What are the common names for the class Ophiuroidea?

  Brittle stars, Long, flexible "arms"
• What are the common names for the class Echinoidea?

  • Sea urchins
  • Sand dollars
  • Heart urchins
• What are the key characteristics of the Echinodermata phylum?

  • Radially symmetrical body plan
  • Endoskeleton made of calcium carbonate plates
  • Tube feet for locomotion and feeding
  • Regenerative abilities
  • Found in marine environments
• What is the body shape of Crinoidea?

  Feather-like arms for suspension feeding
• What is the body configuration of Blastoidea?

  Cup-shaped body with spiral arms
• What are the common names for the classes of echinoderms in the subphylum Echinozoa?

  • Echinoidea: Sea urchins
  • Holothuroidea: Sea cucumbers
• How do the functions of the Crinoidea and Asteroidea classes differ?

  Crinoidea (feather stars, sea lilies) are sessile, while Asteroidea (sea stars) are mobile
• What are the unique features of each echinoderm class?

  • Crinoidea: Feather-like arms for suspension feeding
  • Blastoidea: Cup-shaped body with spiral arms
  • Echinoidea: Spherical body with spines, no arms
  • Asteroidea: Flat body with short, stiff arms
  • Ophiuroidea: Disk-shaped body with long, flexible arms
• What are the five main classes of echinoderms?

  Crinoidea, Ophiuroidea, Asteroidea, Echinoidea, Holothuroidea
• What are the common names for the class Asteroidea?

  • Starfish
  • Short, stiff "arms"
• What is a distinctive feature of Echinodermata's skin?

  They have spiny skin
• What are the common names for the class Crinoidea?

  • "Sea lilies"
  • Crinoids
• What type of skin do echinoderms have?

  Spiny skin
• How is the body structure of Echinodermata organized?

  Organized around a central point
• Why is the ability to regenerate limbs significant for echinoderms?

  It allows them to heal from injuries
• What distinguishes Echinoidea from other echinoderm classes?

  Spherical body with spines, no arms
• If you wanted to observe the detailed external features of an echinoderm, which class would you study?

  Echinoidea (sea urchins)
• How many subphyla are there in the phylum Echinodermata?

  Three
• What are the common names for the class Blastoidea?

  • "Sea buds"
  • Blastoids