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30 Cards in this Set

  • Front
  • Back
Sponges are in which phylum?
phylum porifera
The central cavity in which water is drawn into
water flows out from this after being in the spongocoel
Describe sponges
are sessile animals without specialized organs and tissues, sponges filter food from water pumped through their porous bodies
What is the closest branch of the phylogenetic tree to choanoflagellate?
parazoa, includes phylum porifera
any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body
The body of a sponge consists of two layers of cells separated by gelatinous region called the
they take up food from the water and from choanocytes, digest it, and carry it to the other cells
sponges are hermaphrodites, the carry both the egg and sperm cells.
phylum cnidaria
have radical symmetry, a gastrovascular cavity and cnidocytes, includes jelly fish, hydras, sea anemones, and coral animals
gastrovascular cavity
the basic body plan of a cnidarian is a sac with a central digestive compartment, this is that compartment
are cylindrical forms of cnidirians that adhere to the substratum by the aboral end of the body and extended their tentacles, waiting for prey. includes hydras and sea anemones
is a flattened, mouth down version of a polyp. It moves freely in the water by a combination of passive drifting and contratactions of its bellshaped body. Includes jellyfish
unique cells that function in defense and the capture of prey.
cnidaria, stinging capsules that help defend of capture prey
three classes of phylum cnidaria
hydrozoan, scyphozoans, anthozoan
adhesive structures on comb jellies
phylum platyhelminthes
flatworms are acoelomates with gastrovascular cavities
blood flukes
phylum rotifers
are pseudocolemoates with jaws, crowns of cilia, and complete digestive tracts
is a horseshoe-shaped or circular fold of the body wall bearing ciliated tentacles that surround the mouth.
phylum nemertea
proboscis worms are named for their prey-capturing apparatus
proboscis worms
have no heart, have close circulatoary system, simlar systems to flat worms such as excretory, sensory and nervous systems.
phylum mollusca
mollusks have a muscular foot, a visceral mass and a mantle
name 4 classes of mollusca
gastropoda (snails,slugs)
bivalvia (clams, mussels, scallops, oysters)
cephalopoda (squids, octopuses, chambered nautiluses)
shelled cephalopods
phylum annelida
annelida are segmented worms
phylum nemtoda
roundworms are nonsegmented pseudocoelmates covered by tough cuticles
phylum arthropods
are segmented coelomates with exoskeletons and jointed appendages
layers of protein and chitin