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Lower animals. Sponges Cnidarians Unsegmented worms. Sponges. Phylum: Porifera. Form & Function. Body wall around central cavity Pores. Water moves in by flagella on collar cells H 2 O moves out of osculum. Make-up. Spicule skeleton CaCo 3 or SiO 2 Spongin protein. - PowerPoint PPT Presentation
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Lower animalsLower animals
•SpongesSponges•CnidariansCnidarians•Unsegmented Unsegmented wormsworms
SpongesSponges
Phylum: Phylum: PoriferaPorifera
Form & FunctionForm & Function•Body wall around Body wall around
central central
cavitycavity•Pores Pores
•Water moves in Water moves in by flagella on by flagella on collar cellscollar cells
•HH22O moves out O moves out of osculumof osculum
Make-upMake-up
•Spicule skeletonSpicule skeletonCaCoCaCo33 or SiO or SiO22
•Spongin Spongin
proteinprotein
Life processesLife processes•Filter feedersFilter feeders•Water flowWater flow
–Excretory, Excretory, respiratory& respiratory& internal transportinternal transport
ReproductionReproduction
•SexualSexual•GemmulesGemmules–Like a sporeLike a spore
•BuddingBudding
Nervous systemNervous system
•No brainsNo brains•No No
feelingsfeelings
In the worldIn the world
•Shrimp snails Shrimp snails worms bacteria worms bacteria live in, on, and live in, on, and under themunder them
People usesPeople uses
•Bath spongesBath sponges•MedicinesMedicines–Natural toxins Natural toxins against bacteriaagainst bacteria
Phylum: Phylum:
CnidariaCnidaria
What are theyWhat are they
•Soft bodied Soft bodied animalsanimals
•Tentacles Tentacles around the around the mouthmouth
2 stages of Life2 stages of Life
•PolypPolyp–stationary stagestationary stage
•MedusaMedusa–Motile bell-shapeMotile bell-shape
Polyp stagePolyp stage
Medusa stageMedusa stage
Digestion & Digestion & FeedingFeeding
•Gastrovascular Gastrovascular cavitycavity
•NematocystsNematocysts•Use photosynthesisUse photosynthesis
Nervous systemNervous system
•No brainNo brain•Nerve net on Nerve net on mouthmouth–For feedingFor feeding
Class:HydrozoaClass:Hydrozoa•HydraHydra•Usually polypsUsually polyps•Some Some hermaphroditeshermaphrodites
•Ex. Portuguese man-Ex. Portuguese man-o-waro-war
Class:ScyphozoaClass:Scyphozoa
•JellyfishJellyfish•Most harmless Most harmless Cause painCause pain
•Few can KillFew can Kill
Class:AnthozoaClass:Anthozoa
•Anenomes & Anenomes & coralscorals
•In tide poolsIn tide pools•Make-up reefsMake-up reefs
Cnidarians in Cnidarians in the worldthe world•Reef ecosystemsReef ecosystems•medicinesmedicines
Unsegmented Unsegmented wormsworms
•PlatyhelminthesPlatyhelminthes–FlatwormsFlatworms
•NematodaNematoda–RoundwormsRoundworms
PlatyhelminthesPlatyhelminthes
•PlatyPlaty–flatflat
•HelminthHelminth–wormworm
PlatyhelminthesPlatyhelminthes
Simplest animals Simplest animals with bilateral with bilateral symmetrysymmetry
Lifestyles of Lifestyles of the Flat and the Flat and simple simple BrainedBrained•Free-livingFree-living•ParasitesParasites
Free-livingFree-living•Eat with mouth Eat with mouth & pharynx& pharynx
•Excrete Excrete through mouththrough mouth
ParasitesParasites
•Absorb digested Absorb digested nutrientsnutrients
•Pharynx- Pharynx- intestinal sacintestinal sac
CirculationCirculation•No circulatory No circulatory systemsystem
•Diffusion used to Diffusion used to transporttransport
Nervous systemNervous system
•Simple brainSimple brain•Long nerve cordLong nerve cord•Ocelli eye spotOcelli eye spot
ExamplesExamples
•PlanariansPlanarians
ExamplesExamples
•FlukesFlukes
ExamplesExamples
•TapewormsTapeworms
Phylum:Phylum:NematodaNematoda
RoundwormsRoundworms
Life-styles…Life-styles…
•Both Parasites & Both Parasites & free-livingfree-living
•Round tube Round tube shaped w/ shaped w/ bothboth mouth and anusmouth and anus
CirculationCirculation
•No internal No internal transporttransport
•Goes through Goes through body wallbody wall
Nervous systemNervous system•No BrainsNo Brains•Ganglia nervesGanglia nerves•Detect chemicals Detect chemicals and movementand movement
ReproductionReproduction
•Sexual- must be Sexual- must be inside host to inside host to reproduce.reproduce.
IN the worldIN the world
•Hookworm- Hookworm- enter the footenter the foot
•TrichonosisTrichonosis–TrichinellaTrichinella
Filarial Worms-Circulatory and Lymphatic System
exploded intestine
Pinworms