During respiration, air circulates round plant tissues via the

During respiration, air circulates round plant tissues via the intercellular spaces. Intercellular spaces are the spaces that exist between plant cells. They provide a pathway for the exchange of gases, such as oxygen and carbon dioxide, between the plant cells and the environment. These spaces are particularly important in the process of respiration because they facilitate the diffusion of gases necessary for the release of energy from food molecules. The other options listed (lenticels, stomata, guard cells) are all involved in the exchange of gases in plants, but they do not play a role in air circulation around plant tissues during respiration.