How did egyptians breathe in pyramids?

Ancient Egyptians designed pyramids with air shafts to facilitate ventilation and ensure a supply of fresh air. These shafts, often aligned with specific stars or cardinal points, allowed airflow into the burial chambers. Additionally, the construction of the pyramids included large stone blocks that created natural ventilation spaces, helping to maintain a breathable environment inside. Despite these measures, the air quality in the deeper chambers could still be quite poor.