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