Simple Invertebrates Flashcards
aquatic invertebrate animals that comprises the sponges
Porifera
an aquatic invertebrate animal of the phylum Cnidaria, which comprises the coelenterates.
Cnidaria
also known as the ringed worms or segmented worms
Annelids
a coelenterate of an order that includes the hydras. They are distinguished by the dominance of the polyp phase.
Hydroid
a free-swimming marine coelenterate with a jellylike bell- or saucer-shaped body that is typically transparent and has stinging tentacles around the edge
Jellyfish
The flatworms
Platyhelminthes
A large phylum of worms with slender, unsegmented, cylindrical bodies, including the roundworms, threadworms, and eelworms
Nematoda
a small nematode worm that is an internal parasite of vertebrates
Pinworms
a parasitic flatworm, the adult of which lives in the intestine of humans and other vertebrates. It has a long ribbonlike body with many segments that can become independent, and a small head bearing hooks and suckers.
Tapeworms
an aquatic mollusk that has a compressed body enclosed within a hinged shell, such as oysters, clams, mussels, and scallops
Bivalves
snail, slug, or whelk.
Gastropods
have a body cavity
Coelomate
no body cavity
Acoelomate
symmetry around a central axis
radial symmetry
lack of equality or equivalence between parts or aspects of something
Asymmetry
symmetry down the center
bilateral symmetry
a slender flexible limb or appendage in an animal, especially around the mouth of an invertebrate, used for grasping, moving about, or bearing sense organs
Tentacle
s an explosive cell containing one giant secretory organelle or cnida
Cnidocyte
the outermost layer of cells or tissue of an embryo in early development
ectoderm
the innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures.
endoderm
a female reproductive organ in which ova or eggs are produced
Ovary
Male reproductive organs.
teste
