Are the lungs part of respiratory system?

Yes, the lungs are part of the respiratory system. The respiratory system is a system of organs that works together to get oxygen into the body and remove carbon dioxide. The lungs are two large, spongy organs located in the chest cavity. They are made up of millions of tiny air sacs called alveoli. The alveoli are lined with capillaries, which are tiny blood vessels. Oxygen from the air we breathe diffuses across the alveoli and into the capillaries. Carbon dioxide diffuses out of the capillaries and into the alveoli. The oxygen-rich blood is then pumped by the heart to the rest of the body. The carbon dioxide-rich blood is pumped to the lungs, where it is exhaled.