Which system is responsible for taking in oxygen and releasing carbon dioxide?

The respiratory system is the body’s primary mechanism for gas exchange, which is the process of taking in oxygen and expelling carbon dioxide. This system includes structures such as the lungs, trachea, and bronchi that facilitate airflow. When you breathe in, oxygen from the air enters the lungs and is transferred to the bloodstream, where it is transported to cells throughout the body. Conversely, carbon dioxide, which is a waste product of cellular metabolism, is carried back to the lungs by the blood and expelled from the body when you exhale. The design of the respiratory system, with its vast surface area and delicate alveoli, is specifically adapted for this exchange of gases, making it essential for maintaining the body's overall respiratory function and ensuring that cells receive the oxygen they need while removing carbon dioxide.