Question

State three common features of respiratory organs of animals.

Answer 1

1)All the respiratory organs have large surface area to transport/exchange enough oxygen.
2)All the respiratory organs have thin walls for easy diffusion and exchange of respiratory gases.
3)All the respiratory organs such as skin, gills and lungs, have a rich blood supply for transporting respiratory gases.

Answer 2

All respiratiry have-
Large surface area to transport oxygen.
Have thin wall.
Are rich in blood supply for transportation of respiratory gases.

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