Question

In animals, carbon dioxide waste is exchanged for

Answer 1

oxygen

Step-by-step explanation:

• Through the process of respiration , in lung the carbon dioxide from the blood is exchanged with oxygen.
• The smallest dunctional unit if the lung is the alveoli
• At this level the gases are exchange through the capillaries present close to the alveoli.
• The concentration gradient ,meaning the greater amount of oxygen present in the lungs and greater amount of carbon dioxide in the blood creates a gradient that allow the movment of oxygen into the blood and carbon dioxide in the alveoli through the membrane .
• Partial pressure created allows the easy movement .The carbon dioxide get into the trachea and expelled through nose and mouth.