Study Guides (238,345)
Canada (115,087)
Biology (1,065)
BIOL 165 (42)

Kingdom Metazoa.docx

7 Pages
Unlock Document

University of Waterloo
BIOL 165
Mungo Marsden

Kingdom Metazoa - extracellular matrix made by: collagen long proteins that form triple helix to form fibres with high tensile strength, proteoglycans- roles not understood, glycoproteins-branched molecule that resists compression & returns to its shape, integrin-connects ecm to outside of cells - ecm often form scaffolding that becomes mineralized to form bones, exoskeleton…etc - mistaken point in nfl still has some fossils - acoelomates: lack cavitydigestive cavity, mesoderm, ectoderm, endoderm - pseudoceolomates: has body cavity that is not lined by peritoneumectoderm (skin), mesoderm (muscle), endoderm (gut), mesoderm(internal organs), pseudocoelom - coelomates: body cavity lined with mesodermal peritoneum ectoderm (skin), mesoderm (muscle&internal organs), endoderm (gut), peritoneum, coelom (within mesoderm) - protostomes-mouth first - deuterostomes-mouth secondanus forms from blastopore Basal Phyla Phyla Ctenophora Porifera Cnidaria Sub-Phyla Anthozoa Hydrozoa Scyphozoa Examples Comb Jellies & Sea Sponges Coral Reefs Corals/hydra/Physalia Jellyfish Walnuts Reproduction Sexual Asexualbudding choanocytes Sexualmonoecious/dioecious transform into sponge/eggs & eggs sometimes from archeocytes/asexua l reproduction by budding Organs 2 tentacles used to No organs or true No: coelom, excretory system, respiratory system gather food. tissues Has: nerve net, sensory organs, stinging nematocysts, simple muscular system, gastrodermis Mouth,pharynx,stomac layer+epidermis layer, gastrovascular cavity+extensible tentatcles h,2 anal pores & branching system Traits Beat of flagella starts Gelatinous matrix Reefs formed by Jellyfish look alike, dangling Movement is rhythmical with bell at top of the band and & supported by accumulation of tenticles. Stinging opening and closing through moves down toward skeleton of minute Calcium carbonate nematocysts can cause nasty compression the base, reverse spicules. Capable skeletons welts & great pain direction allows for the of limited organism to move movement. backwards Feed through H2O move through body with choanocytes Morphology/ Biradially symmetrical Asconoid/ Radial symmetrical Radial symmetrical Symmetry Syconoid/ Leuconoid morphology for sponge Notes Choanocytes- “Flowering animal” worker cells involved in food capture Archeocytes- amoeboid cells that move about gelatinous matrix&differentiat e into different cells types Pinocytes-thin flat epiderm like layer Bilateria Superphyla Deuterostomia Phyla Echinoderma Hemichordata Chordata Subphylum Urochordata Cephalochordata Vertebrata Examples Starfish, brittlestars, sea urchins,Acorn worms Lampreys, lancelets, urochordates, cartilagionous and bony fish, amphibian, sand dollars, sea cucumbers reptiles, dinosaur, birds and mammals Reproduction Hermaphroditic Nearly always separate sexes, each sex w/ paired gonads and ducts leading to cloaca or special anal opening Organs Endoskeleton of dermal Tunicates may be solitary, Feed by filtering Animals with heads and calcareous ossicles w/ spines or colonial or form a compound organic particles skulls, vertebrae and spicules in dermis organism. from sea water. spinal chord and a lot of Digestive system is usually Lack distinct head things that we have in complete, axial of coiled. which is why they common with fish, Blood vascular system is much are in their own frogs, flamingo and reduced subphyllum zebra Excretory organs are absent Free swimming bilateral larval stages Traits Unique water vascular system of Notochord coelomic origin extends from the Dorsal tubular nerve chord body surface as a series of Pharyngeal pouches tentacle like progections (tube Postanal tail feet) Integument-2 layers: Locomotion via tube feet outer epidermis of stratified, inner dermis of connective tissue w/ modifications Muscular perforated pharynx Ventral Heart Endocrine system Body plan:head, trunk, postanal tail, distinct neck, 2 pairs of appendages Morphology/Symmetry Unsegmented body with Bilateral symmetry; segmented body; triploblastic Pentaradial symmetry Complete digestive system Endoskeleton/cartilaginous present in majority of species Postanal tail(extending beyond the anus at some stage) Segmented muscles in unsegmented trunk Notes Marine lancelets Humans are one of the Show all 4 traits great apes most closely of all chordates related to chimpanzees in simplest form Afrotheria and Xenarthra clades evolved and diversified in southern hemisphere supercontinent Gondwana L Protostomia Ecdysozoa Clade Phyla Nematoda Onychophora Arthropoda Sub-Phyla Trilobita Chelicerate Crustacea Uniramia Examples Pseudocoelomate Velvet trilobites Scorpion, Crabs, Insects,millipedes, worms worms/walking ticks, mites lobsters, centipedes worms copepods, shrimp Reproduction Dioecious with unisexual Metamorphosis:egg, males smaller several larval instar than females stages, pupa, adult butterfly most important part
More Less

Related notes for BIOL 165

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.