Phylum Organization Symmetry Skeleton Support Movement Locomotion Porifera Cellular N A Cnidaria Tissue Epidermis Gastrodermis Mesoglea matrix Platyhelminthes Organ Asymmetrical Amorphous Radial Oral aboral Spongin Mesohyl Spicules Mesoglea Hydrostatic skeleton Adults are sessile Circular longitudinal Bilateral Cephalization Mesenchyme Circular longitudinal transverse Nemertea Nemertina Nematoda Rotifera Bryozoa Organ Organ Annelida Organ Bilateral Bilateral Cephalization Bilateral Mesenchyme Hydrostatic skeleton N cuticle B operculum zooecium gelatinous chitin CaCO3 Hydrostatic Skeleton Circular longitudinal transverse N Longitudinal R Circular longitudinal B circular longitudinal Larvae free swimming Adult sessile Long circular muscles Produce peristaltic movement Setae chaeta chitinous bristles of epidermis P lots of setae O few setae L none Embryonic Development Diploblastic Triploblastic Endoderm Ectoderm Mesoderm Acoelomate Triploblastic Endo Ecto Meso Acoelomate Triploblastic Endo Ecto Meso N R eutely Pseudocoelomate Triploblastic Protostome Eucoelomate Schizocoelous becomes mesoderm Determinate spiral cleavage Digestion Feeding Excretory Sensory Nervous Reproduction Diffusion carnivorous Diffusion N A Circulatory Respiration Diffusion Ingestion GVC Cnidocytes Extracellular INCOMPLETE digestive system Free living or parasitic Extracellular COMPLETE digestive system Proboscis in rhyncocoel Stylet firing COMPLETE w specialization N trilobed esophagus R corona concentrates trophy grabs food mastax grinds B lophophore traps food U shaped gut COMPLETE w specialization P eversible pharynx jaws O Muscular pharynx gizzard typholosle Egestion of nitrogenous waste via mouth Diffusion Protonephridia Flame cells Protonephridia Flame cells Diffusion Nerve net Diffusion Nerve net CLOSED circulatory system Walls contract Nerve Ladder N excretory duct Renette glands tubular canal system Pseudocoelom circulates material w in body Diffusion R protonephridia R OPEN circulatory Cerebral ganglion N papillae dorsal ventral nerve cords R ocelli dorsal ventral nerve cords papillae B Diffusion Metanephridia CLOSED circulatory system system Contractile vessels Diffusion B simple Cerebral ganglion Ganglion per body segments Ventral nerve cord Monoecious Dioecious Asexual budding fragmentation gemmules Monoecious Dioecious Asexual budding fragmentation pedal laceration Monoecious penis fencing Dioecious Asexual fission Monoecious Dioecious Asexual fragmentation regeneration N Dioecious sexually dimorphic R Parthenogenesis mictic cycle B Statoblasts P Some dioecious trocophore larvae O typically monoecious clitellum H typically monoecious Phylum Organization Symmetry Skeleton Support Movement Locomotion Arthropoda I Organ Bilateral Exoskeleton Chitin CaCO3 Ecdysis shedding of exoskeleton Diverse often use highly specialized appendages Apodeme site of muscular attachment to exoskeleton Arthropoda II Organ Bilateral Chitinous exoskeleton Six legs often highly modified for Mollusca Organ Bilateral Calcareous shell secreted from mantle Ecdysis Metamorphosis a particular lifestyle Two sets of wings usually sometimes one set is thickened and used as a protective barrier for the other set e g the elytra in Coleoptera Foot modified into tentacles in some groups Jet propulsion Embryonic Development Triploblastic Eucoelomate Protostome Schizocoelous Determinate spiral cleavage Triploblastic Eucoelomate Protostome Schizocoelous Determinate spiral cleavage Triploblastic Protosdtome Eucoelomate reduced coelom Schizocoelous Determinate Spiral Cleavage Excretory Very Diverse Circulatory Respiration Diverse Chelicerata have book gills aquatic book lungs terrestrial Crustacea have book gills Open Circulatory System Very Diverse Ganglion w nerve cords Sensory Nervous Ganglion w nerve cords Reproduction Very diverse mostly dioecious Digestion Feeding COMPLETE digestive system Diverse feeding strategies Some digestion external Arachnida Complete digestive system Foregut and hindgut lined w ectoderm chitin therefore absorption takes place in midgut only Predators herbivores omnivores detritivores Mouthparts highly modified for feeding Complete digestive tract w specialization Muscular gut Radula Anus opens into mantle cavity Pericardial coelom collects waste through diffusion of heart wall OPEN in all but Cephalopoda Three chamgered heart Hemocoel blood filled Diffusion through gills or sinus lungs Pair of ventral nerve cords innervating foot Pair of dorsal nerve cords innervating viscera Complex sense organs Eyes Osphradia Statocysts Chemoreceptors Tactile organs Dioecious Complex courtship Internal fertilization Sperm storage Eggs often have diapauses Mainly dioecious some Gastropods monoecious Internal or external fertilization Trocophore larvae Veliger larvae Etymology pore bearers Characterized by choanocytes collar cells Sponge larvae parenchymula Phylum Porifera Classification Asconoid BSU basic sponge unit simplest body type that consists of spongocoel opening to the exterior by means of the osculum Choanocytes line the inner wall of the spongocoel and move water through by flagella Syconoid demonstrate simple folding of body wall Walls external form walls of incurrent canals Choanocytes only occur in radial canals do not line spongocoel Leuconoid most complex body type Complex folding of body wall choanocytes found in flagellated chambers Organization Cellular level 4 main types Choanocyte filter feed create H2O currents become sperm Amoebocyte Archaeocyte totipotent phagocytosis become eggs Porocyte form donut shaped openings called prosopyles Pinacocyte outer protective layer Mesohyl like jello in b layers Embryonic Development N A Symmetry Asymmetrical most Amorphous No specific body shape Water Flow in Asoconoid Ostium spongocoel choanocytes osculum Water Flow in Syconoid Ostium incurrent canal prosopyle radial canal choanocytes apopyle spongocoel osculum Water Flow in Leuconoid Ostium incurrent canal prosopyle flagellated chamber choanocytes apopyle spongocoel osculum Skeleton Support Spicules geometric crystal structures SiO2 CaCO3 Spongin elastic protein Mesohyl acellular gelatinous medium Movement Locomotion Adults are sessile Digestion Feeding Diffusion Carnivorous sponges Velcro like spicules Excretory Diffusion Circulatory Respiratory Diffusion Reproduction Sexual Monoecious hermaphroditic Dioecious separate sexes Asexual budding fragmentation gemmules Phylum Cnidaria Hydras Jellyfish Sea anemones
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