Pulmonary Respiration
Pulmonary respiration is the process of gas exchange that occurs in the lungs. It involves the intake of oxygen from the air and the release of carbon dioxide, a waste product of cellular metabolism, back into the air. This vital process ensures that the body receives a constant supply of oxygen for cellular respiration while removing carbon dioxide, which can be harmful if it accumulates in high levels.

Key Points:
- Gas Exchange: Pulmonary respiration involves the exchange of gases, oxygen and carbon dioxide, between the air in the lungs and the bloodstream.
- Alveoli: The main site of gas exchange in the lungs is the alveoli, tiny air sacs where oxygen diffuses into the blood and carbon dioxide diffuses out.
- Diaphragm: The diaphragm, a dome-shaped muscle located below the lungs, plays a crucial role in breathing by contracting and expanding to create changes in lung volume.
- External Respiration: This phase of pulmonary respiration involves the exchange of gases between the lungs and the bloodstream. Oxygen is taken up by the blood while carbon dioxide is released into the alveoli to be exhaled.
- Internal Respiration: In this phase, oxygen is delivered to the body's tissues by the blood, while carbon dioxide produced by cellular metabolism is carried back to the lungs to be exhaled.
- Respiratory System: The respiratory system, which includes the lungs, airways, and muscles involved in breathing, is responsible for facilitating pulmonary respiration and ensuring the body receives an adequate supply of oxygen.

Respiration through lungs is called pulmonary respiration.