Question

Which of the following statement(s) are true with respect to digestive system and respiratory system?

• A. Digestive system and respiratory system are interdependent.
• B. Respiration helps in oxidation of food.
• C. Digestive system makes respiration easy.
• D. Respiration and digestion are mechanical processes.

Answer 1

Answer: (A), (B)

The correct options are
A Digestive system and respiratory system are interdependent.
B Respiration helps in oxidation of food.

$\bullet$ Food has to be oxidised for the release of energy. Oxygen for this process is supplied by the inhalation of air. The oxygen is carried by haemoglobin of red blood cells to all the cells of our body. Thus the respiratory system and digestive system are dependent on each other.
$\bullet$ Digestion involves both mechanical and chemical process. Respiration is a chemical process.