Study Guides (238,527)
Australia (3,439)
Biology (46)
BIOL10005 (18)
Rick (3)

Summary of Theresa's Animal Kingdom Lectures 25-27

4 Pages
Unlock Document

University of Melbourne

ANIMAL KINGDOM (Lectures 25-31) Main phyla in Animalia Kingdom:  Nematodes (round worms, moult)  Cnidaria (jellyfish, corals, anemones)  Sponges  Platyhelminthes (flatworms)  Arthropods (insects, crusacea, millipedes)  Annelids (true worms, leeches)  Molluscs (snails, slugs, squid)  Echinoderms (seastars, urchins)  Chordates (vertebrates, sea squirts) SPONGES  No symmetry, organs, systems, mouth or gut.  Reproduce both sexually & asexually CNIDARIA  Hydras, jellyfish, corals, anemones  Radial symmetry  Diploblastic (no mesoderm), but with mesoglea (gelatinous layer) at centre  Acoelomate  Unsegmented  Nerve net with photoreceptors  Have cnidocytes (stinging cells) which contain nematocysts (stinging filament) on their tentacles.  Polyp form = sedentary, asexual  Medusa form = free-floating, sexual  Examples: Hydra (polyp) with mouth surrounded by tentacles, jellyfish (medusa), corals and anemones (polyps) are colonial. PLATYHELMINTHES (Flatworms)  Free-living or parasitic  Bilateral symmetry  Triploblastic (contain mesoderm) but acoelomate.  Protostome (mouth developed first)  Have a gut  NOT segmented  Cilia to help move  Digestive and nervous system  Example: Tapeworms (parasites, made up of reproductive units, NOT segments as such) ANNELIDS  Bilateral symmetry  Triploblastic (have mesoderm) and coelomate (have a coelom)  allows for girth  Protostomes (mouth developed first in blastula)  Segmented body parts (functional units)  Vascular system (gases, nutrients), nervous system  Examples: marine worms (mostly sexual), earth worms (hermaphrodites, sexual), leeches (feed on blood, sexual -> hypodermic impregnation) ARTHROPODS  Bilateral symmetry  Triploblastic & coelomate  Protostomes (mouth developed first)  Segmented body  Jointed appendages  Chitinous Exoskeleton  Protection, muscle support, prevents desiccation)  Moult (shedding of exoskeleton)  Common to Nematodes as well  Unique compound eye  Examples: o Chelicerata (scorpions, spiders) o Myriapoda (centipedes, millipedes) o Crustacea (mostly marine, biramous appendages – limbs split into 2 or are branched, 2 pairs of antennae) o Insects (mostly terrestrial, wings for flight, uniramous appendages – limbs unbranched, head, thorax and abdomen) Arthropods comprise >80% animal species (most diverse phylum of animalia) – why are they so successful?  Chitinous Exoskeleton  Protection, muscle support, prevents desiccation  Many different ways of body segmentation (some segments specialised for specific functions)  Diverse range of types of
More Less

Related notes for BIOL10005

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.