No, invertebrates do not breathe carbon dioxide. All animals breathe oxygen.
yes
It uses it's gills to extract oxygen from the water to oxygenate it's blood and also to expel carbon dioxide from the blood.
Yes! CO2 as you know its carbon dioxide so fish is a living things and gives out carbon dioxide.
They absorb carbon dioxide from the water - and release oxygen. This keeps the water's oxygen level safe for the fish to survive.
They have no purpose whatsoever! Fish are very important to the Earth uc they maintain a constant balance of our ecosystems ie they take in algae as oxygen much like we do via photsynthesis and continually give back via Co2 to replenish the algae. The fish does the same thing we do to survive - inhale oxygen and breathe out carbon dioxide. The algae depends on our carbon dioxide to live much like the rainforests that do but uc the balance of this is based on give and take, the tree via photosynthesis creates oxygen for us to live much like the algae of the seas. Yet it cannot survive without our breathing- our carbon dioxide and many more creatures that take in oxygen and let go of carbon dioxide - That make any sense ?
The gills of fish are equivalent to the lungs in humans. Their job ois to exchange the dissolved oxygen from the water with the carbon dioxide of the shark's blood.
Fish breathe in oxygen and convert it, breathing out carbon dioxide.
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Carbon Dioxide
carbon dioxide...
carbon dioxide
A fish takes in Oxygen and passes out Carbon dioxide and Ammonia through its gills.
The water that the fish swims in passes over the gills - these work like our own lungs - taking in oxygen, and expelling carbon dioxide. This is why you need to change the water in the tank on a regular basis - because the level of carbon dioxide increases daily.