JLAB Academic Practice Test 2026 - Free JLAB Academic Practice Questions and Study Guide

The primary function of the respiratory system is to transport oxygen and carbon dioxide between the body and the environment. This system facilitates the process of respiration, which involves inhaling oxygen-rich air and exhaling carbon dioxide, a waste product generated by cellular metabolism. The lungs are the key organs in this system, where gas exchange takes place in the alveoli, allowing oxygen to enter the bloodstream while carbon dioxide is expelled.

This function is crucial for maintaining the body’s metabolic needs, as oxygen is essential for cellular respiration—the process by which cells generate energy. The efficient exchange of these gases also plays a significant role in maintaining the pH balance of the blood and ensuring that all biological processes function optimally.