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like any other fish. water passes through their gills and the gills absorb the oxygen through their gills.
any animal that is on land at some point in its life obtain oxygen the same exact way we do. the only animal that obtains oxygen in a different way is the fish and it obtains its oxygen by filtering the water it swims through between its gills.
Lancelets do not have lungs that aid in their respiration. The two ways in which lancelets obtain the necessary oxygen for sustaining their life is by taking oxygen in through their pharynx and absorbing oxygen through their skin.
They obtain oxygen from water through gills (during at least part of their life cycle).
I believe the process is called,"Photosynthesis"! Plants do not obtain oxygen they produce oxygen through a process called photosynthesis. The sun produces energy and they change carbon dioxide and water into food oxygen is a byproduct of this process.
using their gills they obtain oxygen from the top of the water.
Some species of amphibians do not have lungs or gills, but obtain all their necessary oxygen and water through their skin. Other amphibians have lungs for breathing air, but use their skin to take in additional oxygen, as well as water, through capillaries in their skin.
Every animal breathes oxygen, even fish (they obtain it by the oxygen in the water).
Cnidarians are able to absorb the oxygen they need from the surrounding water by diffusion.
Bullfrogs can breathe underwater through their skin. They can stay under water for as long as they can obtain oxygen through their skin.
ostichs is dont know
same way the fish do