Invertebrates Flashcards
Porifera
the phylum of sponges
Cnidaria
an invertebrate animal characterized by the specialized stinging structures in the tentacles surrounded by the mouth
annelida
any segmented worm
Hydroid
a coelenterate of an order that includes the hydras
Jellyfish
a free swimming marine coelenterate with a jellylike bell
Platyhelminthes
a phylum of worms having bilateral symmetry
Nematoda
a roundworm
Pinworms
an internal parasite of vertebrates
Tapeworms
a parasitic flatworm
Bivalves
an aquatic mollusk that has a compressed body enclosed within a hinged shell
Cephalopods
an active predatory mollusk
Gastropods
a mollusk
Coelomate
a fluid filled body cavity
Acoelomate
an invertebrate lacking a coelom
Radial Symmetry
symmetry around a cantral axis as in a starfish or a tulip flower
Asymmerty
lack of equality or equivalence between parts or aspects of something
Bilateral Symmetry
dividing something into two equal parts
Tentacle
a tender flexible limb
Cnidocyte
is an explosive cell
Ectoderm
the outermost layer of cells or tissue of an embryo
Endoderm
the innermost layer of cells or tissue of an embryo
Ovary
where the eggs are produced
Teste
produces spermatozoa
