1. INSECT
RESPIRATION

2. Spiracles

3. Spiracle Structure

4. Spiracular structure
peritreme
spines
atrium
trachea

5. Spiracular Valves
valve
filter
peritreme
trachea
valves
Closer muscle

6. Respiratory System

7. Tracheal Support
Taenidia
Annuli

8. Respiratory System - Major Trachea
dorsal trunk
heart
dorsal commissure
lateral trunk
thoracic air sac
spiracle
gut
ventral trunk
ventral nerve cord
ventral commissure

9. Oxygen Delivery to Cells

10. Ventilation Mechanisms - Passive
Level or rate of release
closed
open
closed
open
closed
Time
Water
CO2
Spiracle
Oxygen

11. An interesting movie on insect respiration