Biology Chapter 33 Invertebrates

Front 1

Sponges are in which phylum?

Back 1

phylum porifera

Front 2

spongocoel

Back 2

The central cavity in which water is drawn into

Front 3

osculum

Back 3

water flows out from this after being in the spongocoel

Front 4

Describe sponges

Back 4

are sessile animals without specialized organs and tissues, sponges filter food from water pumped through their porous bodies

Front 5

What is the closest branch of the phylogenetic tree to choanoflagellate?

Back 5

parazoa, includes phylum porifera

Front 6

choanocytes

Back 6

any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body

Front 7

The body of a sponge consists of two layers of cells separated by gelatinous region called the

Back 7

mesohyl

Front 8

amoebocytes

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they take up food from the water and from choanocytes, digest it, and carry it to the other cells

Front 9

hermaphrodites

Back 9

sponges are hermaphrodites, the carry both the egg and sperm cells.

Front 10

phylum cnidaria

Back 10

have radical symmetry, a gastrovascular cavity and cnidocytes, includes jelly fish, hydras, sea anemones, and coral animals

Front 11

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

Front 12

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

Front 13

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

Front 14

cnidocytes

Back 14

unique cells that function in defense and the capture of prey.

Front 15

nematocysts

Back 15

cnidaria, stinging capsules that help defend of capture prey

Front 16

three classes of phylum cnidaria

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hydrozoan, scyphozoans, anthozoan

Front 17

colloblasts

Back 17

adhesive structures on comb jellies

Front 18

phylum platyhelminthes

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flatworms are acoelomates with gastrovascular cavities

Front 19

schistosoma

Back 19

blood flukes

Front 20

phylum rotifers

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are pseudocolemoates with jaws, crowns of cilia, and complete digestive tracts

Front 21

lophophore

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is a horseshoe-shaped or circular fold of the body wall bearing ciliated tentacles that surround the mouth.

Front 22

phylum nemertea

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proboscis worms are named for their prey-capturing apparatus

Front 23

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.

Front 24

phylum mollusca

Back 24

mollusks have a muscular foot, a visceral mass and a mantle

Front 25

name 4 classes of mollusca

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polyplacophora
gastropoda (snails,slugs)
bivalvia (clams, mussels, scallops, oysters)
cephalopoda (squids, octopuses, chambered nautiluses)

Front 26

ammonites

Back 26

shelled cephalopods

Front 27

phylum annelida

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annelida are segmented worms

Front 28

phylum nemtoda

Back 28

roundworms are nonsegmented pseudocoelmates covered by tough cuticles

Front 29

phylum arthropods

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are segmented coelomates with exoskeletons and jointed appendages

Front 30

exoskeleton

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layers of protein and chitin