Fill in the blanks:
The leaves of plants use ............... for the exchanges of gases.

Where does the exchange of gases occur?

Human lungs have _______ of air sacs for the exchange of gases.

Discuss the exchange of gases in plants.

Fill in the following blanks with suitable words: In earthworm, exchange of gases occurs through the ……………

Fill in the following blanks with suitable words: In insects, exchange of gases occurs through …………

Fill in the following blanks with suitable words: In fishes, exchange of gases occur through …………………

Fill in the blanks: The plants which depend on the food produced by other plants are called................ .

Skin helps in exchange of gases because