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Respiration through gills

4. Respiration through Lungs

Organisms Organ Mechanism of Respiration

Birds Lungs Lungs are present in their
chest cavity.
They have air-filled sacs near
the lungs.
The air sacs make the body
of the birds lighter, which help
them to fly.
Mammals Lungs Refer to module 14.
(Mechanism of breathing in
humans).
Amphibians, such as,frogs Dual mode of breathing During hibernation, frog takes
and toads oxygen through their skin,
Moist skin
which is supplied with blood
Gills capillaries from outside by
diffusion.
Lungs During tadpole stage, they

respire through gills in water.

After maturation, they
develop lungs. Frogs respire
through lungs on land.

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