08InsectPhysI

08InsectPhysI - invaginations of epidermis continuous with...

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1 Announcements Lab Quiz on Monday. Covers labs until this week. I will not test you on biological keys to order and family. Final segments of abdomen – Female • Gonopore on segment 8 • Structures for copulation – Male • Copulatory organ called aedeagus • May function in clasping and sperm transfer • Segment 10- no appendages • Segment 11- cerci Ovipositor Modifications
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2 Variation in abdomenal appendages Internal Anatomy and Physiology Nervous system Excretory Sensory organs Digestive system Musculature Tracheal system Reproductive system Circulatory system Endocrine system Body cavity Body Cavities True coelom- reduced to surrounding reproductive and excretory organs Hemocoel Contains circulatory system Bathes internal organs in blood Distributes nutrients
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3 Tracheal System • Take in oxygen, release gas wastes • Lining continuous with cuticle • Branched Tracheae
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Unformatted text preview: invaginations of epidermis continuous with cuticle shed with exoskeleton rings exible yet resist compression branch out to small tracheoles air reaches respiring tissues Tracheal system Spiracles open into trachea valve at opening 4 Evolutionary exibility in tracheal system Open in terrestrial environments A. Cockroach B. Honeybee C. Mosquito larva Closed in aquatic environments D. Parasitoid E. Mayfly larva F. Dragonfly larva Circulation Open circulatory system Hemolymph Plasma: Water reservoir Chemical exchange Hematocytes Immune response Coagulation Nutrient storage and distribution Circulation- dorsal heart In pericardial sinus Muscular vessel enclosed by body wall and diaphragm Valves prevent backow Pumps push blood from posterior towards head...
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This note was uploaded on 03/02/2012 for the course BIOLOGY 323 taught by Professor Rank during the Spring '08 term at Sonoma.

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08InsectPhysI - invaginations of epidermis continuous with...

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