The respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide. It is composed of several organs including the nose, trachea, bronchi, and lungs.

Nasal Cavity
The process of respiration begins in the nasal cavity where air is warmed, humidified, and filtered of any impurities or debris.

Pharynx and Larynx
The air then travels through the pharynx and larynx, where it is further filtered and moistened.

Trachea and Bronchi
The air then enters the trachea and bronchi, which are lined with tiny hairs called cilia that help to trap any impurities or debris that may have made it through the nasal cavity and pharynx.

Lungs
The bronchi branch off into smaller and smaller tubes, eventually leading to the lungs. The lungs are made up of millions of tiny air sacs called alveoli, where the exchange of oxygen and carbon dioxide takes place. The oxygen from the air we breathe diffuses into the bloodstream through the walls of the alveoli, while carbon dioxide from the bloodstream diffuses into the alveoli to be exhaled out of the body.

Diaphragm
The process of breathing is controlled by the diaphragm, a muscle located at the bottom of the chest that contracts and relaxes to move air in and out of the lungs.

Conclusion
In conclusion, the respiratory system is a complex network of organs that work together to bring oxygen into the body and remove carbon dioxide. It is an essential process that allows our bodies to function properly and stay healthy.

The primary organs of the respiratory system are the lungs, which function to take in oxygen and expel carbon dioxide as we breathe. The gas exchange process is performed by the lungs and respiratory system. Air, a mix of oxygen and other gases, is inhaled. In the throat, the trachea, or windpipe, filters the air.