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Download Multicellularity Tissues bilateral symmetry body cavity coelom
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Multicellularity Tissues bilateral symmetry body cavity coelom segmentation jointed appendaes deuterostomes notochord 1 2 P. Platyhelminthes Members Flatworms, planaria, flukes, tapeworms Habitat Marine, freshwater, and moist land Importance Cause disease Parasitic in plants and animals Method of obtaining food/digestive system Extends pharynx and sucks up food into gastrovascular cavity or absorbs nutrients from host Asexual reproduction Regeneration (some) Fission 3 Sexual Reproduction (internal or external fertilization) Most hermaphrodites Internal exchange sperm Life cycle with many hosts Symmetry Bilateral Nervous System Ganglia Eyespots Ability to learn Sensory organs Circulatory System Diffusion Respiratory System Diffusion Anything else?? Tapeworms can grow to 10 m long Flukes need snails and humans to reproduce 4 tapeworm 5 fluke Planaria 6 P. Nematoda Members Roundworms Habitat Soil, animals, marine, and fresh water Importance Parasitic (some) in plants and animals Method of obtaining food/digestive system Parasitic-absorbs nutrients Predators-capture food in mouth Asexual reproduction None 7 Sexual Reproduction (internal or external fertilization) Internal fertilization Male deposits sperm Parasite has 2-3 hosts Symmetry Bilateral Nervous System Free-living Sense organs Ganglia Circulatory System Diffusion Respiratory System Diffusion Anything else?? Moves with muscles and cilia 8 Whipworm 9 A=mouth G= excretory tube B=pharynx H=excretory pore C=intestine I=ovary D=anus J=oviduct E=body wall K=uterus F=pseudocoelom L=testis M=vas deferens N=seminal vesicle O=spicule P=dorsal nerve cord Q=ventral nerve cord 10
