Do invertebrates have a respiratory system?
Yes, Invertebrates have respiratory system.
upto phylum Annelida no special respiratory organs are found. The respiratory system first appears in phylum Arthropoda. Trachea, Book lungs, book gills are respiratory organs in Arthropodans.
Mollusca have gills.
Echinodermata have Tube feet, Respiratoryy tree and bursae
The respiratory system works with almost all the other body systems in the human body. For Example: The respiratory system works with the nervous system because the brain tells the respiratory system when to breathe in or breathe out. The respiratory system works with the skeletal system, by allowing the skeletal system to protect the respiratory organs, like how the ribs protect the lungs.