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Download Biology 179 – Worksheet for Class Insecta and
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Biology 179 – Worksheet for Class Insecta and General Body Plan for Echinodermata Class Insecta Most are terrestrial Three body sections – 1. ______, 2.___________ and 3.__________ Insects generally have _______ legs attached to the _______ (section) – How many antennae?? ________ – How many wings ?? ____________ – What type of eyes?? _____________ – Mouthparts specialized Internal organization – What type of circulatory system do they have?? __________ – What type of excretory system do they have?? ___________ – What type of respiratory system do they have??____________ – Define “Fat Bodies” _______________ Sensory Hairs – what are they, where are they, and what do they do?? ________ Tympanum - what is this and what is it used for?? ______________ Pheromones – what are these and what are they used for?? ___________________ Life Histories – 2 basic types – Simple metamorphosis (hemimetabolus) Immatures called nymphs – Several instars – becoming more adultlike each time – Complete metamorphosis (holometabolus) 90% of insects Immatures called larvae – Often different from adults – Resting stage – pupa – Direct development – ametabolous Primitive insects (silverfish and springtails) – Molting controlled by juvenile hormone and molting hormone (ecdysone) Some Orders of Insects (Define these and describe the unique features of each) – – – – – – – – Coleoptera Diptera Lepidoptera Hymenoptera Hemiptera Orthoptera Odonata Isoptera Phylum Echinodermata What type of development does this group show?? _________________ Echinoderm Body Plan– spiny skin – What type of symmetry do they show?? _________...why is this termed “Secondary…..?” Bilateral larvae (bipinnaria) – What type of nervous system do they have?? _______________ – Endoskeleton Calcite plates (ossicles) under epidermis May fuse in some to form shell Water Vascular System – Define this..___________________ – Where does water enter this system? ____________________ Conducted through stone canal to ring canal – Surrounds esophagus Enters 5 radial canals to hundreds of tube feet (podia) – Ampullae control tube feet Body Cavity – coelom – Filled with WVS, gonads, and digestive glands – Extensions of coelom to body surface Papulae (skin gills) – respiration Reproduction – Regeneration and splitting (asexual) – Sexual – dioecious, external fertilization
