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Transcript 
INSECT
CIRCULATORY
SYSTEM
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 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
4. No long-term immune response,
recognition system
Acquired immunity
No acquired immunity
Generalized Insect Circulatory system
Dorsal Vessel
aorta
Dorsal
diaphragm
Pericardial
sinus
heart
Perivisceral
sinus
Ostia
Ventral
diaphragm
Perineural
sinus
Pericardial
sinus
Dorsal
diaphragm
Perivisceral
sinus
Ventral
diaphragm
Perineural
sinus
Heart - Ostia
One-way valves
Heart - Ostial Valves
Chaoborus
Bombyx
Heartbeat
P
A
Perstaltic waves (myogenic)
Circulation of hemolymph
Haemolymph pressure
Accessory Pulsatile Organs
Circulation in the Wings
IN: costa, subcostal, radial, median, cubitus
OUT: anal
Heartbeat
systolic
diastolic
Dorsal vessel
volume
Hemolymph - Composition
Inorganics (Na, Ca, K)
Nitrogenous waste
CHO’s - trehalose
Lipids
Amino acids
Proteins
Pigments
Hormones
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
Hemolymph - Insect Blood
Hemocytes
Action of Hemocytes
Encapsulation
Pericardial cells
Pericardial cells
Heart
Fat Body
Fat body cells
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