Echinoderms
What type of body do they have?
Endoskeleton
Name one of the four distinctive features
Notochord
Pharyngeal pouches
Postanal tail
How do lancelets swim?
They have a fish like motion
Sea lilies are ___ for part of their lives.
Sessile
What class does a sea star belong to?
Asteroidea
What do all echinoderms have as adults?
Pentaradial symmetry
What is a notochord?
A flexible, rodlike structure that extends the length of the body
All invertebrate chordates are ___
Marine animals
Sea cucumbers tentacles are covered in what?
Mucus
Sea star can have up to __ tube feet
2000
What are tube feet?
Fluid filled tubes that end in suction cup like structure and are used in movement
What is a postanal tail?
How do lancelets eat/feed?
They are filter feeders
Most brittle stars have _ arms
five
How do echinoderms reproduce?
They reproduce sexually
How do they get their food?
They extend their arms and trap food
What is a pharyngeal pouches?
Gills for gas exchange in water
How many species of lancelets are there?
23 species
Holothuroidea
Why is the structure of the endoskeleton important?
For determining the type of movement and echinoderm can undertake
What do sensory neurons respond to?
They respond to touch, chemicals dissolved in the water, water currents and light
Where do lancelets burrow their bodies?
How many species of tunicates are there?
1250 species
They can be found in shallow water burrowing into the sand
If a body part is lost they can __
Regenerate