Tracheoles:
1. It is part of tracheal respiratory system in insects.
2. Fine intercellular tubes present deep into cells.
3. End blindly in cells.
ADVERTISEMENTS:
4. Filled with watery fluid at blind end.
Bronchioles:
1. It is part of respiratory system (lungs) in man.
2. These are not intercellular but they present in lungs.
ADVERTISEMENTS:
3. Branch further and end ultimately in alveolar sacs.
4. Not filled with watery fluid.