What are the main functions of the respiratory system?

The main functions of the respiratory system are to supply oxygen to the body and remove carbon dioxide. This process begins with the act of breathing, where air is brought into the lungs and exchanged through tiny sacs called alveoli. The oxygen is then transported through the bloodstream to all cells in the body, where it is used to produce energy through a process called cellular respiration. The respiratory system also helps regulate the body's pH levels by removing excess carbon dioxide, which is a waste product of metabolism. Additionally, the respiratory system plays a role in vocalization and helps regulate body temperature through the control of breathing rate and depth.

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