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Platy,Nema,Anne

QuestionAnswer
Coelom cavity
Triploblastic 3 germs layers
3 Germ layers Endoderm, ectoderm, and mesoderm
Endoderm gives rise to the lining of the gut
Ectoderm gives rise to the covering (skin)
Mesoderm gives rise to everything else (organs, muscles, etc)
Acoelomate no body cavity
Pseudocoelomate tube within a tube
Coelomate "true" body cavitay
Hydrostatic skelteon use fluid for structure and movement
Phylum Platyhelminthes acoelomates, very diverse and abundant, free living parasitic, dorsal and ventral flatted together, has cephalization and sensory organs (eye spots), blind digestive system
Cephalization brain
Blind digestive system one opening
Class Turbellaria Phylum Platyheminthes, moist and aquatic, free living scavengers
Dugesia Phylum Platyheminthes Class Turbellaria
Class Trematoda Phylum Platyheminthes, vertebrate parasites
Fasciola Phylum Platyheminthes, Class Trematoda, sheep liver fluke
Class Cestoda Phylum Platheminthes, highly specialized endoparasites, no digestive tract, ribbon like body with scolex neck and proglottids
Scolex has hooks and suckers for attachment
Neck where groth initiates
Proglottids serially repeating segments
Phylum Nematoda Pseudocoelomate, both freeliving to parasite, longitudional muscles, hydostatic skeleton, complete digestive system
Longitudinal muscles run length of worm makes it "wiggle"
Complete digestive system two openings
Turbatrix Phylum Nematoda
Ascaris Phylum Nematoda, intestinal roundworm
Trichinella Phylum Nematoda, causes trichinosis
Necator Phylum Nematoda, known as hookworm
Enterobius Phylum Nematoda, known as pinworm
Phylum Annelida Coelomate, specialization allows for specialized organs, circular/longitudinal muscles, closed circulatory system, has dorsal nerve cord
Class Polychaeta Phylum Annelida, marine worms, strong cephalization, have paraphodiae and setae
Class Clitellata Phylum Annelida,have clittelum include the earthworms,
Clittelum mucus-secreting structure that produces egg sac
Oligochaeta Phylum Annelida, Class Clittelum, earthworms
Hirudinea Phylum Annelida, Class Clittelum leeches
Created by: missmyk
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