Simple Invertebrates Flashcards
Phylum that includes the organisms known as sponges.
Porifera
Aquatic invertebrate animal which compromises the coelenterates.
Cnidaria
Any of various worms, or wormlike animals. Cylindrical body that can be divided into segments.
Annelida
A coelenterate of an order that includes the hydras.
Hydroid
A free swimming marine coelenterate with a jellylike bell-or saucer shaped body that is typically transparent with stinging tentacles around the edge.
Jellyfish
Worms having bilateral symmetry and a soft, usually flattened body.
Platyhelminthes
Worms with slender unsegmented cylindrical bodies. including roundworms, threadworms, and eelworms.
Nematoda
Small nematode worm that s is an internal parasite of vertebrates.
Pinworms
Parasitic flatworm.
Tapeworms
An aquatic mollusk that has a compressed body enclosed within a hinged shell.
Bivalves
A mollusk of the large class, such as a snail, slug, or Whelk.
Gastropods
The main body cavity in most multicellular animals and is positioned inside the body to surround and contain the digestive tract and other organs.
Coelomate
An inverterbrate lacking a coelom.
Acoelomate
Symmetry around the central axis, as in a starfish or tulip flower.
Radial Symmetry
Not identical on both sides of the central line, like a jellyfish.
Asymmetry
