Respiration in Organisms Class 7 Notes

Respiration in Organisms Class 7 Science Notes – Chapter 10

All living organisms breathe to survive. Respiration is necessary for survival. When we inhale oxygen, it breaks down glucose into water and carbon dioxide. This occurs in the cells of organisms. Therefore Energy is released from the food in the process. The breakdown occurs in two forms viz aerobic respiration or anaerobic respiration.

• Anaerobic respiration – Breakdown occurs in the absence of oxygen. Example, If the supply to the muscles is not sufficient during heavy exercise, the breakdown of food occurs through this type of respiration.
• Aerobic respiration – Breakdown occurs in the presence of oxygen. Please refer Respiration in Organisms Class 7 Notes for more revision notes.