Sharks are a fish. Fish have gills that extract oxygen directly from the water in which they live.
Our body obtain oxygen to our body by breathing.
Swimming helps to force water through the shark's gills, providing the shark with oxygen; the shark may not get enough oxygen otherwise.
Crustaceans obtain oxygen through gills.
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
The gills of a shark (and other fishes) extract oxygen from the water, allowing the shark to breath.
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.
They absorb the oxygen from the cell which gets its oxygen from the blood