1. INSECT CIRCULATORY SYSTEM

2. Comparison of Mammal and Insect Circulatory Systems 1.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 3. No red blood cells. Some insects have hemoglobin. O 2 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 aortaheart Dorsal diaphragm Pericardial sinus Perivisceral sinus Perineural sinus Ventral diaphragm Ostia

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

6. Heart - Ostia One-way valves

7. Heart - Ostia

8. Heart - Ostial Valves Chaoborus Bombyx

10. Heartbeat P A Perstaltic waves (myogenic)

12. Circulation of hemolymph Relative pressure

13. Accessory Pulsatile Organs

14. Heartbeat systolic diastolic Dorsal vessel volume

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

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

21. 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

22. Hemolymph - Insect Blood

23. Hemocytes

24. Action of Hemocytes

25. Encapsulation

26. HeartPericardial cells

27. Fat body Fat Body