Define respiration and explain its importance.

Respiration is the biological process by which living organisms break down food (glucose) to release energy required for various life processes.

This process occurs in cells, where glucose reacts with oxygen to produce energy, carbon dioxide, and water. The released energy is used for activities such as growth, movement, repair, and maintenance of body functions.

Respiration is important because it provides energy necessary for all metabolic activities. Without this energy, cells cannot function, and life processes would stop.

It also helps in the removal of carbon dioxide, a waste product that can be harmful if accumulated in the body.

Thus, respiration is essential for survival as it ensures a continuous supply of energy and maintains internal balance in organisms.