Bio Lecture 19: Invertebrates 1
Bio Lecture 19: Invertebrates 1 BIO 209L-001
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This 3 page Class Notes was uploaded by Kiara Reyes on Friday October 16, 2015. The Class Notes belongs to BIO 209L-001 at Northern Illinois University taught by Dr. Renee Kopulos in Summer 2015. Since its upload, it has received 70 views. For similar materials see Human Anatomy and Physiology I Lab - SL in Biological Sciences at Northern Illinois University.
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Date Created: 10/16/15
Lecture 19 Invertebrates 1 Phylum ll 4 In some species reproduction can be both a Asexual new polyps can form and bud off b Sexual producing sperm and eggs that fuse to form zygotes 5 Body Layers Tissue cells similar in appearance andor function Cnidocyes are predators hunting other organisms Coral Reef Corals are polype with exoskeleton of calcium often hard a Live one grow on old skeletonl build up b Only in clear shallow water because from symbiosis with photosynthetic algae Phylum Platyhelminthes 1 Cysts in Meat muscle quotunenecystquot in vertebrate gut where attach with hooks 2 No Gut or Mouth 3 Out of host via a segment sac of seX organs or eggs produced by segment in each block Lives off the host letting the host do most of the work to help it survive 39amp 1 Egg in feces 2 Hatch ciliated larva 3 Infect snailsintermediate host living off the hose life source 4 Changes to a Forktailed larva 5 Infects human through the feelany body part in water 6 Sexual reproduction in Human gut V Regenerate well becomes stem cells throughout body which can differentiate Where ever cut can both regenerateregrow each other body and nerve tissue Annelids lEctoparasites Leech anticoagulant is produced commercially by inserting that gene into unicellular fungi yeasts a Earthworms bristles b Leeches use front hind sucker Repeated body cavities Repeated nephridia maintain proper dilution like kidney Repeated blood vessel rings front ones pump like a heart Repeated nerve clumps includes somewhat of a brain in the quotheadquot P PFTP Basic body plan similar among all molluses main parts to know Toothed tongue of gastropods scrapes algae can also be damaging herbivores in agriculture 2 shell halves Suspension feeders strain food from water that passes over feeding iters If sand or other irritant get under shell bivalve makes secretion Generally fastmoving predators Tentacles made up of modified part of food Well developed complex brain Octopi often considered the most intelligent invertebrates with apparent memory and problem solving abilities
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