zoology 1604 Zool 1604 Animal Biology
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This 4 page Class Notes was uploaded by Terran Johnson on Thursday February 11, 2016. The Class Notes belongs to Zool 1604 Animal Biology at Oklahoma State University taught by Dr. Elisa Cabrera Guzman in Winter 2016. Since its upload, it has received 33 views. For similar materials see Animal Biology in Animal Science and Zoology at Oklahoma State University.
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Date Created: 02/11/16
Phylum Porifera(pore+to bear) ● Neither trip nor diplo ● Virtually in all aquatic habitats and create habitats for other organisms. ● Diversity hotspots ● Absorb and filter water ● Multicellular allows for greater body size. ● Its body is perforated by many pores for filtering. ● Radial or Asymmetric ● Adults sessile(attached to some surface) ● Skeleton that is composed of spicules *Sponge Classes! *SPICULE TYPES *SPONGE CELL TYPES(choanocytes, porocytes, pinacocytes, archeocytes) ● Feeding intracellular digestion ● Eats bacteria, plankton and detritus ● Phago and pino cytosis ● Kingdom Protista, Phylum Choanoflagellata ● Body Plans Asconoid, Leuconoid, sychonoid ● Ascon: Porocytes, Class Calcarea, inside lined with choanocytes, less complex, radial symmetry ● Syconoid: More efficient at filter feeding, folding of layers to increase SA, belongs to Class Calcarea, radial symmetry ● Leuconoid: flagellated chambers, no spongocoel, very complex, occurs in all classes, more choanoderm exposed to surface for filter feeding, asymmetrical. ● No respiratory or excretory system; diffusion, contractile vacuoles. No nervous system. Monoecious(produce eggs and sperm), can also have asexual reproduction(buds and gemmules). Some sponges are carnivorous Friday, February 12, 2016 1:55 PM Phylum Cnidaria ● Cnidaria have blind/ incomplete gut ● Cnidaria (carrying net Diplo, radial or biradial, have cnidocytes that harbor stinging apparatus, have gastrovascular cavity, nerve net and dimorphic. ● Incomplete food comes in the same way waste goes out ● Dimorphic polyp or medusa, asexual and sessile polyps, sexual and motile medusa (dioecious) ● Feeding carnivorious, use tentacles to capture prey, initial extracellular digestion but finishes intracellular. ● Respiration and Excretion Diffusion ● Osmoregulation marine are isotonic, freshwater expel excess water via cells. *Cell Types and Arrangements ● Statocysta used for navigating in euqilibriam, Ocelli light sensative ● Alternate generation asexual > sexual Class Hydrozoa ● lternate generations, polyp and medusa, Class Scyphozoa ● True jellyfish, medusa stage ● Aurelia Class Cubozoa ● Sea wasps and box jellyfish ● Biradial ● Tentacles hang from corners ● 6 image forming eyes Class Anthozoa ● Sea anemones and corals ● Only polyp stage ● Freeliving ● Symbiotic relationships Phylum Ctenophora ● Ctenophora have complete even though they are diplo ● Biradial ● Diplo possibly triplo ● Gastrovascular cavity ● Nerve net ● Complete gut (anal pores) ● Colloblasts on tentacles with sticky substances used for catching prey ● Also have statocysts ● Comb rows that are covered in cilia
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