Name the substance which is oxidised in the body during respiration.

Which organs are attached to the two bronchi?

Explain the exchange of gases in tissues with a schematic representation.

Which of the following statement$(s)$ is (are) correct?
$(i)$ Pyruvate can be converted into ethanol and carbon dioxide by yeast.
$(ii)$ Fermentation takes place in aerobic bacteria.
$(iii)$ Fermentation takes place in mitochondria.
$(iv)$ Fermentation is a form of anaerobic respiration.

During respiration,exchange of gases takes place in:

The end products of a biological process are ethanol and carbon dioxide with the release of energy. Name this process and write the pathway involved in the reaction.