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INSECT CIRCULATORY SYSTEM

INSECT CIRCULATORY SYSTEM. Comparison of Mammal and Insect Circulatory Systems. Closed system with blood vessels and heart. 1. Open system-hemocoel. 2. Heart - ventral. 2. Heart/aorta - dorsal. 3. Red blood cells carry O 2 and CO 2 . Use hemoglobin carrier molecule.

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INSECT CIRCULATORY SYSTEM

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  1. INSECT CIRCULATORY SYSTEM

  2. Comparison of Mammal and Insect Circulatory Systems Closed system with blood vessels and heart 1. Open system-hemocoel 2. Heart - ventral 2. Heart/aorta - dorsal 3. Red blood cells carry O2 and CO2. Use hemoglobin carrier molecule 3. No red blood cells. Some insects have hemoglobin. O2 delivered by trachea 4. Have an immune system with long-term recognition system Acquired immunity 4. No long-term immune response, recognition system No acquired immunity

  3. Generalized Insect Circulatory system Dorsal Vessel aorta heart Ostia Dorsal diaphragm Ventral diaphragm Perivisceral sinus Pericardial sinus Perineural sinus

  4. Pericardial sinus Dorsal diaphragm Perivisceral sinus Ventral diaphragm Perineural sinus

  5. Heart - Ostia One-way valves

  6. Heart - Ostial Valves Bombyx Chaoborus

  7. Heartbeat P A Perstaltic waves (myogenic)

  8. Circulation of hemolymph

  9. Accessory Pulsatile Organs

  10. Circulation in the Wings IN: costa, subcostal, radial, median, cubitus OUT: anal

  11. Heartbeat diastolic systolic Dorsal vessel volume

  12. Hemolymph - Composition Inorganics (Na, Ca, K) Nitrogenous waste CHO’s - trehalose Lipids Amino acids Proteins Pigments Hormones

  13. Hemolymph - Functions 1. Lubricant for tissues 2. Hydraulic fluid 3. Transport mediium 4. Storage - amino acids and glycerol 5. Protection - reflex bleeding 6. Non-cellular immune responses

  14. Hemolymph - Insect Blood

  15. Hemocytes

  16. Action of Hemocytes

  17. Encapsulation

  18. Pericardial cells Pericardial cells Heart

  19. Fat Body Fat body

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