BSC 2011L Kingdom Animalia All animals are multicelluar and heterotrophic Some means of locomotion Always diploid Animal Taxonomy Domain Eukarya Kingdom Animalia ○ Invertebrates Parazoa – no true tissue layers • Phylum Porifera – sponges • Grantia Eumetazoa – true tissues, symmetry - RADIATA – radial symmetry • Phylum Ctenophora – comb jellies • Phylum Cnidaria • Class Hydrozoa – Portuguese man of war, Hydra, Obelia • Class Scyphozoa – jelly fish • Class Anthozoa – coral and sea anemones Body Symmetry Phylum Porifera Live in water, mostly marine No true tissues Adults are sessile but larvae are mobile planktonic assymmetrical Can produce asexually and sexually Digestion – intracellular choanocytes Circulation – water transport Phylum Porifera Animal: Symmetry: Body cavity: Digestion: Circulation: Segmentation: Appendages: Nervous: Habitat: Respiration: Excretion: Locomotion: Support: sponges asymmetrical spongeocoel intracellular choanocytes water transport, amoebocytes none none none Aquatic, marine diffusion diffusion none (sessile, however larvae are flagellated) spicules Phylum Ctenophora Radially symmetrical True tissues (diploblastic) Move by cilia Many are bioluminescent Phylum Cnidaria Radially symmetrical True tissues (diploblastic) Two body forms: polyp and medusa Part of zooplankton Reproduce sexually and asexually Carnivores Digestion – gastrovascular cavity Circulation – cells in direct contact with water Phylum Cnidaria Have nerve net between 2 tissue layers Cnidocytes Stinging cells Each one has fluid filled capsule called nematocyst ○ Contains thread that trap or sting prey Phylum Cnidaria Class Hydrozoa - Hydra Animal: Symmetry: Body cavity: Digestion: Circulation: Segmentation: Appendages: Nervous: Habitat: Respiration: Excretion: Locomotion: Support: Hydra Radial coelenteron (sac) gastrovascular cavity cells in direct contact with water none tentacles around mouth nerve nets Aquatic diffusion none limited none Hydra Model What are we doing today? Phylum Porifera Phylum Cnidaria Observe preserved Observe specimens specimens Figure 22.2 Class Hydrozoa ○ Be able to identify structures Look at prepared slide of Grantia Look at slide of spicules Phylum Ctenophora Observe preserved specimens ○ Hydra – Observe model - Know following parts: mouth, gastrovascular cavity, tentacle, basal disk, gland cell, mesoglea, cnidocyte Observe microscope slides