BIO 112 Lecture Notes - Lecture 5: Orthoptera, Hemiptera, Hymenoptera
19 Oct 2016
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To get larger, must shed cuticle and produce a larger one: ecdysis. New cuticle needs to harden: this takes time, very vulnerable. Parasites of nearly all animal and plant species. 25,000 species have been named, but there may be as many as 500,000. Body wall consists of cuticle, epidermis with muscles. Body movements and more food push food through. Ring of nerve tissue in head with dorsal and ventral nerve cords. Some of the things we see as bad", they eat. Parasitic to all animals and plants (including humans) C. elegans as model organism: good to keep in lab and study. Pinworms: once infected they lay their eggs in your anus. Guinea worm: lives in lymph nodes, like to live in feet. Trichinosis: eat meat that has the cist in it, the adults have babies and then live in your muscles and make cists. Insect bites (filarial worms: heartworms, lymph issues, river blindness)
