Wildlife Biology Flashcards
porifera
a phylum of primitive invertebrate animals comprising the sponges and having a cellular grade of construction without true tissue or organ formation
cnidaria
a phylum of more or less radially symmetrical invertebrate animals that lack a true body cavity
Annelida
The annelids, also known as the ringed worms or segmented worms, are a large phylum
Hydriod
a hydrozoan polyp as distinguished from a hydrozoan jellyfish.
jelly fish
a free-swimming marine coelenterate with a jellylike bell- or saucer-shaped body that is typically transparent and has stinging tentacles around the edge.
Platyhelminthes
are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
Nematoda
with dorsal and ventral nerve cords, and with lateral excretory ducts that are parasites of humans, animals, or plants or free-living dwellers in soil or water and are known as roundworms
pinworms
a small nematode worm that is an internal parasite of vertebrates.
Tapeworms
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.
Bivalves
an aquatic mollusk that has a compressed body enclosed within a hinged shell, such as oysters, clams, mussels, and scallops.
gastropods
mollusk of the large class Gastropoda, such as a snail, slug, or whelk.
Coelomate
have a body cavity called a coelom with a complete lining called peritoneum derived from mesoderm
Acoelomate
an invertebrate lacking a coelom especially : one belonging to the group comprising the flatworms
Radial Symmetry
symmetry around a central axis,
Asymmetry
lack of equality or equivalence between parts
