BSC 2011 L SPONGES CTENOPHORES CNIDARIANS Kingdom Animalia

BSC 2011 L SPONGES, CTENOPHORES, CNIDARIANS

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 Aquatic, marine 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 Figure 22. 2 Class Hydrozoa ○ Hydra – ○ Be able to identify structures Look at prepared slide of Grantia Look at slide of spicules Phylum Ctenophora Observe preserved specimens Observe model - Know following parts: mouth, gastrovascular cavity, tentacle, basal disk, gland cell, mesoglea, cnidocyte Observe microscope slides