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INSECT NERVOUS SYSTEMS AND SENSE ORGANS Types of Neurons axon unipolar bipolar multipolar Insect Central Nervous System brain subesophageal thoracic ganglion ganglia abdominal ganglia Insect Brain protocerebrum hypocerebral ganglion deutocerebrum tritocerebrum recurrent nerve frontal ganglion subesophageal ganglion Insect Brain - Dorsal View corpus pedunculatum frontal ganglion optic lobe corpora cardiaca recurrent nerve hypocerebral ganglion corpora allata ingluvial nerve ingluvial ganglion subesophageal ganglion Stomatogastric Nervous System hypocerebral ganglion ingluvial nerve ingluvial ganglion recurrent nerve frontal ganglion Sensory Organs - Mechanoreceptors membrane seta (hair) tormogen cell epithelium trichogen cell bipolar neuron HAIR SENSILLUM (TRICHOID SENSILLUM) HAIR SENSILLUM (TRICHOID SENSILLUM) Sensory Organs - Mechanoreceptors coeloconic campaniform ampullaceous placoid Sensory Organs - Mechanoreceptors Chordotonal organs scolopale neuron scolopidium Johnston’s Organ Johnston’s Organ Chemoreceptors Thin-walled Thick-walled Chemoreceptors basiconic coeloconic Thin-walled plate Insect Eyes Insect Eye lens crystalline cone Semper’s cell primary pigment cell secondary pigment cell retinular cell rhabdom axons to CNS basement membrane Two kinds of Eye
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