Bio Unit 9 Test

Front 1

cnidocyte

Back 1

mechanical trigger shoots out thread covered with nuerotoxin when touched. it injects the toxin and paralizes the prey

Front 2

primative cnidarians

Back 2

alternate b/t medusa and polyp stage. in these, medusa sextually reproduce forming a larval stage that grows into a polyp that can reproduce asextually forming new meduse

Front 3

advanced cnidarians

Back 3

show a reduction of one of the stages (medusa/polyp). jelly fish mainly exist in the medusa stage, sea anenomeas only exist in polyp stage

Front 4

phylum ctenophora

Back 4

comb jellies; 8 rows of cillia, covered with sticky cells called colloblasts; radially symmetrical; true tissues; diploblastic; incomplete D.T

Front 5

phylum platyhelminthes

Back 5

flat worms: simplest animals that're bilaterally symmetrical; cephalization; excratory sys - flame cells; includes planaria, flukes, and tapeworms

Front 6

planaria anatomy

Back 6

hermaphrodite; cutaneous respiration; pharynx extended through mouth on ventral surface; branched intestine reaches all parts of the body; cup shaped eyespots for direction/ intensity of light; gaglion

Front 7

gaglion

Back 7

cluster of nerve cells

Front 8

flatworm exretory sys

Back 8

live in fresh water, so water diffuses in. flame cells get rid of excess water and metabolic wastes

Front 9

flukes

Back 9

anterior and ventral suckers help them to attach to host=good parasite. adults hook up and live in human intestines & reproduce sextually; lay eggs which come out in feces and land in water; eggs hatch and live in mollusks; reproduce asextually; 2nd larval stage burrows through skin to liver where they mature into adults; circulate to intestines

Front 10

tapeworms

Back 10

no digestive tract b/c they live in intestine which has nutrients; covered w/ tegument so they dont get digested. scolex (asextual stage) has hooks and suckers which allow it to attach to inside of intestines; it has offspring (proglottids)that become mature (have reproductive sys); gravid (full of larvae-containig eggs) proglottids break off and exit body through feces; cow eats larvae and it burrows into muscle; human eats it unercooked

Front 11

how is the planarian nervous sys organized?

Back 11

2 ventral nerve cords with branches on either side with brain

Front 12

phylum nematoda

Back 12

roundworms: pseudocoelom (acts as hydrostatic skeleton); complete digestive tract; free-living or parasitic; triploblastic, bilateral; most have separate sexes

Front 13

cnidarian life cycle

Back 13

adult medusa sextually reproduce; eggs develope into swimming larva; larva settles on ocean floor and developes into polyp; it reproduces asextually growing upward; old buds pop off and form new meduse

Front 14

parasitic roundworms

Back 14

ascaris, hookworms, trichinella, pinworms, filarial worms

Front 15

ascaris

Back 15

intestinal parasite

Front 16

hookworms

Back 16

teeth latch on to small intestinal wall; reproduce sextually asnd release eggs into feces; larva hatches out in water; when someone walks through water it goes in though foot and circulates to throat where you swallow it; goes back to intestine

Front 17

trichinella

Back 17

wroms that form sists in muscles - causes pain b/c they interfere with contraction; get this from eating rare pork

Front 18

pinworms

Back 18

live at end of intestine just inside anus; females lay eggs; you itch in sleep - on fingers; trasfers to others

Front 19

filarial worms

Back 19

infect lymphatic vessels - allows fluid in but now out so they stretch and fill with fluid. elephantitis

Front 20

secondary function of excretory system

Back 20

maintain water balance (osmoregulation)