They don't have one.
they have the same respiratory as humans
It has fhfdfygh
Yes roundworms have nervous systems!
The kind of water habitat that a roundworms live in is salt water
They have closed circulatory systems.
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Annelids are segmented whereas roundworms are not. Annelids have a true coelom while roundworms have a pseudocoelom. Annelids have a more complex nervous system than roundworms. Annelids have a more complex circulatory system than roundworms.
yes
a pulmonologist.
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The respiratory system is the system that handles breathing.
The Respiratory System