1. Respiratory Organs: Lungs act as the main respiratory organs of animals.
2. Gaseous exchange: The alveoli of the lungs carry out gas exchange.
3. CO2 emission: It emits CO2.
4. Synthesis of chemical substances: Synthesis of proteins, sugars and fats takes place in the lungs.
5. Release chemicals: Pulmonary canals synthesize and release bradykinin and prostaglandins.
6. Sound production: Sound is produced through the larynx.
7. Chemical storage: Pulmonary banana stores and releases histamine and serotonin.
8. Inactivation of hormones: It inactivates adrenaline and noradrenaline hormones.
9. Water and heat balance: It regulates body temperature and water balance. About 400-600 milliliters of water is released from the body every day through breathing.
10. Chemical secretion: It secretes immunoglobulin and angiotensin-1 to angiotensin-2.
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11. Homeostasis: It maintains the internal environment or homeostasis state of the body.
12. Volatile gas: It emits chloroform, ether, ammonia etc.
13. Preventing the entry of harmful substances: Air germs and harmful substances prevent the entry into the body.
14. Acid-base balance: Lungs maintain acid-base balance in the body.
15. Energy production: The absorbed O2 is used in cellular growth and produces energy.