Respuesta :
Answer:
They can breathe in oxygen.
Explanation:
By letting it flow over there gills it helps them make oxygen.
Conclusion from this information is:-
- Like land animals Marine animals also need oxygen to breathe.
- For this purpose they have a specialized organ called gills.
- They direct the flow of ocean water over gills and take oxygen from it
What are Gills?
is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide.
How gills extract oxygen from water?
- Gills contain many filaments, each with thousands of tiny folds called lamellae, which greatly increase the surface area that comes into contact with water.
- Dissolved oxygen in seawater passes through thin membranes in the lamellae and enters the fish's blood, and carbon dioxide is eliminated.
To know more about gills here
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