No respiratory organs. They use an internal cavity.
Both forms have a single Body_orificeand body cavity that are used for digestion and Respiration_(physiology), so yes, cnidarians do have a respiratory system.
There are no respiratory organs, and both cell layers absorb oxygen from and expel carbon dioxide into the surrounding water. When the water in the digestive cavity becomes stale it must be replaced, and nutrients that have not been absorbed will be expelled with it.
closed respiratory system
Your lungs, the diaphragm, alveoli, bronchi, and capillaries are all in the respiratory system
Gills
Heart: Circulatory system. Lungs: Respiratory system.
A Z-Pack is the only thing associated with the respiratory system and that is a type of antibiotic.
they have no eyes and no nervous system.
The Respiratory system,The Circulatory system,and The Urinary system.
Phylum Cnidaria.
fun movements
The respiratory system is the system that handles breathing.