Do the lungs take carbon dioxide from blood?

The lungs do not take carbon dioxide from the blood. Instead, the lungs add oxygen to the blood and remove carbon dioxide from it. This is done through the process of respiration. During respiration, the diaphragm and intercostal muscles contract, causing the lungs to expand. This creates a negative pressure in the lungs, which draws air in through the nose or mouth. The air is then warmed and humidified as it travels down the trachea and into the lungs. The oxygen in the air diffuses across the walls of the alveoli into the capillaries, which are tiny blood vessels that surround the alveoli. The carbon dioxide in the blood diffuses across the walls of the capillaries into the alveoli. The oxygen-rich blood is then pumped by the heart to the rest of the body, while the carbon dioxide-rich air is exhaled through the nose or mouth.