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