Porifera & Cnidarians
Aquatic animals with radial symmetry, simple tissues, and possibly some organs
What are cnidarians?
This type of symmetry is found in sponges
What is asymmetrical?
An aquatic invertebrate with two external shells or valves
What is a bivalve?
The process that arthropods undergo in which they transform from a larva into an adult
What is metamorphosis?
The type of mouth that echinoderms have, with 5 radial teeth
What is aristotle's lantern?
Aquatic sessile animals with no tissues or organs
What are porifera?
This type of symmetry is found in sea anemones
What is radial symmetry?
The only type of mollusc that has a closed circulatory system
What is a cephalopod?
The scientific name for a millipede
What is diplopoda?
The unique locomotive system of echinoderms, where water flows through tubes in the organism
What is the ambulacral system?
The stinging cells that inject poison into the prey of a cnidarian
What are cnidoblasts?
This types of symmetry is found in spiders
What is bilateral symmetry?
The main identifying feature of a gastropod
What is an external spiral-shaped shell?
The pincers of an arachnid, used to inject their prey with venom
What are the chelicerae?
This phyla has globular bodies with plates that form a shell and spikes to protect from predators
What is an echinoid (sea urchin)?
The cells that create a flow of water and filter food in a porifera
What are choanocytes?
True or false: invertebrates are ectotherms
True
The external layer of a mollusc that surrounds their internal organs
What is a mantle?
The two types of diets of crustaceans
What are carnivorous and filter feeders?
An echinoderm with a long body and no arms or spikes
What is a holothurian (sea cucumber)?
The two types of structures that can create the internal skeleton of a porifera
What are spicules and spongin?
True or false: corals belong to the group of porifera
False
A spiky tongue that some molluscs use to scrape and grind food
What is a radula?
In incomplete metamorphosis, it is the young, small, wingless version of the organism
What is a nymph?
An echinoderm that has a disc shaped body and usually 5 arms
What is an asteroidean (starfish)?