Final answer:
Anatomical dead space is the air present in the airway that doesn't reach the alveoli for gas exchange. This type of dead space doesn't participate in the process of gas exchange in the respiratory system.
Step-by-step explanation:
Anatomical dead space refers to the air that is present in the airway but never reaches the alveoli for gas exchange. It is a part of the respiratory system that does not participate in the process of gas exchange. There are two types of dead space - anatomical dead space and alveolar dead space.