RBSE Class 7 Science Notes Chapter 10 Respiration in Organisms

These comprehensive RBSE Class 7 Science Notes Chapter 10 Respiration in Organisms will give a brief overview of all the concepts.

RBSE Class 7 Science Chapter 10 Notes Respiration in Organisms

→ The food has stored energy which is released during respiration. Therefore, all living organisms respire to get energy from food.

→ Breakdown of food releases energy.

→ In aerobic respiration :

→ In anaerobic respiration :

→ Our muscle cell can also respire anaerobically, but only for a short time, when there is a temporary deficiency of oxygen.

→ Breathing means taking in air rich in oxygen and giving out air rich in carbon dioxide with the help of respiratory organs.

→ Breathing involves movement of the diaphragm and rib cage.

→ Increased physical activity enhances the rate of breathing.

→ In cockroach : oxygen rich air rushes through spiracles into the tracheal tubes, diffuses into the body tissue, and reaches every cell of the body.

→ Earthworm breathe through their skins. Though frogs have a pair of lungs like human beings, they can also breathe through their skin.

→ Gills in fish help them to use oxygen dissolved in water.

→ In a plant, the roots take in air present in the soil. Leaves have tiny pores called stomata through which they exchange gases.