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Breathing in Animals

Organs that a...

Question

Organs that are used by fish for the exchange of gasses (O₂ and CO₂) in water?

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Solution

Fish:
Fishes are adapted to survive in an aquatic habitat.
Fishes have respiratory structures called gills that help with gaseous exchange.
Gills help the fishes get the dissolved oxygen from water and remove the carbon dioxide.
This exchange of gasses (O₂ and CO₂) through the gills helps with cellular respiration in fishes.

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Q. State whether the following statements are true or false:
(a) During respiration, the plants take CO₂ and release O₂.
(b) Energy can be produced in cells without oxygen.
(c) Fish and earthworm exchange gases during respiration in the same way.

Q. Name the organ used by fishes to breathe in air dissolved in water.

Q. The composition of air inhaled by a human is

21 % O_{2}

0.03 % C O_{2}

and that of exhaled air is

16 % O_{2}

4.03 % C O_{2}

. Assuming a typical volume of

6200 {L day}^{- 1}

O_{2}

C O_{2}

generated by the body at

37^{\circ} C

1.00 b a r

are:
(Assume ideal behaviour)

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