Antiquity_of_Insects

Antiquity_of_Insects - ENTM 2001 Antiquity of Insects Daily...

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1 ENTM 2001 Antiquity of Insects Daily Insect ± Order: Lepidoptera ± Family: Lymantriidae ± Common name: gypsy moth ± Scientific name: Lymantria dispar L.
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2 ± Invasive pest. Defoliates 1 million acres of forest each year. ± Introduced to US in 1868 by a French scientist, Leopold Trouvelot, living in Medford, MA. Brought over gypsy moth eggs to breed in disease resistance into native silk spinning caterpillars. ± Escaped and 1 st outbreak occurred in 1889. The Circulatory System
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3 The Circulatory System ± Function: Transport substances from one part of the body to another ± Vertebrates have closed circulatory systems Fluids contained in vessels ± Insects have an open circulatory system Fluids are not completely confined in vessels ± Majority of hemolymph (insect blood) is found simply “sloshing around” in the hemocoel (body cavity) The Circulatory System ± Major organ of the circulatory system is the dorsal vessel ± Dorsal vessel extends from the posterior end of the abdomen to the head Heart: Found mainly within the abdomen Series of pumping chambers Pumping chambers comprised of a series of segments with paired lateral openings (ostia) Aorta: Found mainly within the thorax Physiological Systems in Insects, M. J. Klowden 2002 The Circulatory System ± The dorsal vessel
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Antiquity_of_Insects - ENTM 2001 Antiquity of Insects Daily...

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