by their gills but they're not gills like fishes because they're not noticeable.
pradators
Our body obtain oxygen to our body by breathing.
Crustaceans obtain oxygen through gills.
What do Cephalopods eat?
They get oxygen from their gills.
Who is "they" ?
you obtain oxygen from your lungs you could breath through your nose and through your mouth
multicellular organisms obtain their oxygen through the respiratory system
Sharks eat cephalopods
We obtain oxygen by breathing in fresh air. Carbon dioxide comes out of us.
No. The skeleton dose not get oxygen
Pterodactyls do not obtain oxygen at this time because they are extinct. While they existed, they probably obtained oxygen in the same way that birds today obtain it through the use of lungs.