External Anatomy (Sept. 15)

External Anatomy (Sept. 15) - External Anatomy Anatomy =...

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External Anatomy Anatomy = Foundation o Parasitic arthropods have developed amazing strategies to live successfully o A strong understanding of external and internal anatomy, with particular attention to the mouthparts, is an important foundation to build on for the rest of the semester. o Lab = Identification o Lecture = Form and function Head o Segments Fused to form capsule o Rigid Protect brain Strength for mouthparts o Sensory Antenna(e) Mostly olfaction o Odor detection for host and oviposition Sometimes for tactile Eyes o Compound eyes Each unit called ommatidium Each unit forms an image Brain complies to form one object o Simple eyes (ocelli) Not all have
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Either 0,1,2, or 3 Only function is light detection Photoperiodism- developmental response to relative lengths of light and dark periods. Insect mouthparts o Mandibulate Chewing (Primitive) o Haustellate Piercing/sucking Probing/sipping Sponging/lapping Thorax
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