What are the grape-like sacs in the lungs responsible for gas exchange called?

The grape-like sacs in the lungs responsible for gas exchange are known as alveoli. These tiny air sacs are critical components of the respiratory system, where the exchange of oxygen and carbon dioxide takes place. Each alveolus is surrounded by a network of capillaries, facilitating the diffusion of gases between the air within the alveoli and the bloodstream. This process is essential for maintaining proper oxygen levels in the body and removing carbon dioxide, a waste product of metabolism.

The structure of the alveoli, resembling clusters of grapes, maximizes the surface area available for gas exchange, making the lungs highly efficient at transferring gases. This design allows for a large amount of oxygen to enter the blood while simultaneously allowing carbon dioxide to be expelled from the body.

Other terms like bronchioles, alveolar ducts, and pleurae refer to different structures and functions within the respiratory system. Bronchioles are small air passages that lead to the alveoli but do not participate directly in gas exchange. Alveolar ducts connect clusters of alveoli but are not the site of gas exchange themselves. Pleurae are the membranes that cover the lungs and line the chest cavity, providing protection and lubrication but are not involved in the gas exchange process. Thus, understanding the role