Question

Oxygen and glucose, required for cellular respiration are transported to the cells by the ________ system.

• A. respiratory
• B. excretory
• C. circulatory
• D. nervous

Answer 1

The correct option is C circulatory

Cellular respiration takes place inside the cells. It is the process of breakdown of glucose using oxygen to produce water vapour and carbon dioxide. Energy is released in the form of ATP. Glucose and oxygen required in the process is transported to all the cells by blood which is part of the circulatory system.
It can be summarised as:
$C_6{H}_{12}{O}_6+6O_2\to 6{\mathrm{CO}}_2+6H_{2}O+38\mathrm{ATP}$