BIOL 152 1st Edition Lecture 14 Outline of Last Lecture - Invertebrates Outline of Current Lecture - EcdysozoanCurrent Lecture- VertebratesEcdysozoanMeans exoskeleton (chitin) moltingNematoda: - Roundworms – no segmentation - All muscles longitudinal, all muscles longitudinal - Psuedocoelom, complete digestive system- No circulatory or respiratory systems- Simple body plan – nematodes are very abundant- Several species parasitic in humans - Trichanella These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Arthropoda: - Segmented- Jointed appendages- Well developed senses – many with compound eyes, olfactory, antennae- Open circulatory system- Gills or trachea Arthropoda: Cheliceraformes - 6 pair of appendages - Predators, suckers, and detritus-feeding groups- Cephalothorax Arthropoda: Myriapoda - Centipedes and millipedes- Eyes sometimes absent- Chewing mouthparts feed upono Detritus in millipedes o Insects in centipedesArthropoda: Insecta - Three body regions: - Heart and open circulatory system - Three pairs of legs on thorax - Many species have wings- Three sets of mouthparts - Cerebral ganglion and ventral nerve cord- Metamorphosis- Insect Evolution, led by: o Pollinators, disease hosts, pestso Radiation of species due to evolution of o Flights o Mouthparts o Flowering plants Arthropoda: Crustacea - Mostly aquatic- Crabs, lobster, crayfish, shrimp, barnacles- Cephalothorax and abdomen, with carapace protecting cephalothorax - All feeding strategiesDueterostome1. Radial and indeterminate 2. Coelom develops from archenteron 3. Blastopore becomes anusEchinodermata: - Quasi-radial (pentamerous) symmetry in adults- Slow-moving or sessile- Water vascular system- Tube feet function in WVS locomotion and feeding- External fertilizationAsteroidea: - Each tube foot bears a suction disc that is used in locomotion, feeding, and adhering to surfaces- Regeneration- Digestion by averting stomach into pried-open bivalve- Pisaster present – diverse intertidal community- Pisaster absent – community dominated by one musselEchinoidea:- 5 rows of tube feet function in movement- Muscles that move their spines for locomotion - Mouth is ringed by jaw-like structures with
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