An excretory duct inside the trachea (400X) Image copyright: University of Oslo, CC BY-NC-ND 4.0. (Tissue stain: H+E). Magnify Labels Up (100X) Try to identify: an excretory duct Hyaline cartilage Pseudostratified columnar epithelium Cilia Goblet cells Published April 27th 2023, updated January 11th 2024. Share on Facebook Tweet Send email