The end product of anaerobic respiration is
The end product of anaerobic respiration is ethanol instead of lactic acid as in the case of animals. Our muscles need oxygen and glucose to respire aerobically and produce the energy they require, these are carried to the muscle through the blood. However if we were to carry out vigorous exercise our heart and lungs would not be able to get sufficient oxygen to our muscles in order for them to respire. In this case, muscles carry out anaerobic respiration. The oxygen supply to plants can also run out, this happens for example if the soil gets waterlogged. In this case, they have to obtain their energy via anaerobic respiration.