Jan. 27 - How a Bug is Built The outside crunchy parts...

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1 How a Bug is Built The outside crunchy parts Exoskeleton Functions 1. Armor 2. Skeletal support muscle 3. Water Conservation (waxy layer on the outside of the cuticle)
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2 Feats of Strength Flea jumps 13 inches = man jumping 450 feet! • Stag beetle can lift 7 oz. in its jaws = man doing a 10-ton bench press…with his mouth! Layers 1. Cuticle 1. Epicuticle 2. Exocuticle 3. Endocuticle 2. Epidermis 3. Basement membrane Molts Doesn’t molt
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3 Exoskeleton Integument Body Wall Molts Doesn’t molt Chitin • Nitrogenous polysaccharide • Exoskeleton contains chitin and protein Takin’ It Off, Takin’ It ALLLLL Off!! • Rigid exoskeleton means… Ecdysis • Only immature stages molt • From one stage to the next while as an immature • Adults do not molt! Exuviae – shed skin Instar – the stage between molting – Different numbers of immature molts depend on the species
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4 Corn earworm has 6 larval instars 1 2 3 4 5 6 Other structures Spine Seta (plural setae)
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5 Spine vs. Seta Apodeme – invagination of the exoskeleton
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6 Plates of Armor Sclerites sutures (membranes) Taking a Walk Around the Outside Dorsal Ventral Anterior Posterior Lateral Body Parts
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This note was uploaded on 10/02/2011 for the course ENTO 2003 taught by Professor Staff during the Spring '08 term at Oklahoma State.

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Jan. 27 - How a Bug is Built The outside crunchy parts...

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