EVERYDAY SCIENCE

Detailed explanation-1: -Once oxygen and carbon dioxide reach the network of intercellular air spaces (arrows), they diffuse rapidly through them. Oxygen and carbon dioxide also pass through the cell wall and plasma membrane of the cell by diffusion.

Detailed explanation-2: -One definition of respiration is the exchange of oxygen and carbon dioxide between the blood of an animal and the environment. Carbon dioxide is also released when organisms breathe. Respiration also takes place at the cellular level. All plants and animals return both carbon dioxide and water vapor to the atmosphere.

Detailed explanation-3: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Detailed explanation-4: -The actual exchange of gases occurs due to simple diffusion. Energy is not required to move oxygen or carbon dioxide across membranes. Instead, these gases follow pressure gradients that allow them to diffuse.

Detailed explanation-5: -Answer and Explanation: Oxygen and carbon dioxide move through the respiratory membrane and into and out of cells by the process of C: diffusion.