Nanoparticles are extremely small particles, typically between 1 and 100 nanometers in size. They can be engineered to carry therapeutic agents, including drugs, genes, or proteins, and release them in a controlled manner. In the context of alveoli, nanoparticles can be inhaled and delivered directly to the lungs, where they can penetrate deeply into the alveolar sacs. This localized delivery ensures that the therapeutic agents are concentrated at the site of action, enhancing their efficacy.
