What is the job of respiratory system?

The respiratory system is responsible for taking oxygen into the body and removing carbon dioxide. The main organs of the respiratory system are the lungs. The lungs are two large organs located on either side of the heart. They are made up of millions of tiny air sacs called alveoli. The alveoli are lined with capillaries, which are small blood vessels. The capillaries are where the oxygen from the air is transferred to the bloodstream, and the carbon dioxide from the bloodstream is transferred to the lungs.

Here is a more detailed explanation of the respiratory system and how it works:

1. Inhalation: The process of breathing in, or inspiration, begins when your diaphragm and intercostal muscles contract. The diaphragm is a muscle located at the bottom of the ribcage. The intercostal muscles are located between the ribs. When these muscles contract, they pull the ribs up and out, which increases the volume of the thoracic cavity (the space inside the ribcage). As the volume of the thoracic cavity increases, air is drawn into the lungs.

2. Exhalation: The process of breathing out, or expiration, begins when your diaphragm and intercostal muscles relax. This allows the ribcage to fall back down, which decreases the volume of the thoracic cavity. As the volume of the thoracic cavity decreases, air is forced out of the lungs.

3. Gas exchange: The alveoli in the lungs are where gas exchange takes place. Oxygen from the air diffuses across the alveoli and into the capillaries. At the same time, carbon dioxide diffuses out of the capillaries and into the alveoli.

4. Transport of oxygen: The oxygen that diffuses into the capillaries is carried by hemoglobin, a protein in red blood cells, to all of the cells in the body.

5. Transport of carbon dioxide: The carbon dioxide that diffuses out of the capillaries is carried back to the lungs, where it is exhaled.

The respiratory system is essential for life. It allows the body to get the oxygen it needs to function properly, and it removes the carbon dioxide that is produced as a waste product.